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how the male body works

how the male body works插图

Hormones
The entire male reproductive system is dependent onhormones. These are chemicals that stimulate or regulate the activity of your cells or organs. The primary hormones involved in the functioning of the male reproductive system are follicle-stimulating hormone (FSH),luteinizing hormone (LH) and testosterone.

What do you know about a guy's body?

Looking under the hood of the male body reveals more than a simple sex-driven, sperm-carrying system. In fact, scientists are still trying to decipher some of the mysteries of the male physique. Here are some wild facts, and unknowns, about a guy's body, from his other brain and the male G-spot to lactating man-breasts and more.

What are the parts of the male reproductive system?

The male reproductive system includes a group of organs that make up a man’s reproductive and urinary system. These organs do the following jobs within your body: They produce, maintain and transport sperm (the male reproductive cells) and semen (the protective fluid around sperm). They discharge sperm into the female reproductive tract.

What are the male sex organs and their functions?

The male sex organs. Vas deferens – the tubes on either side of the body that mature sperm must travel through just before ejaculation. Each tube carries sperm from an epididymis into the body toward the prostate gland. Prostate gland – a walnut-shaped gland that sits in front of the rectum and below the bladder.

What is an erection and how does it work?

What Is an Erection? An erection starts in your brain. Something you saw, felt, smelled, heard, or thought makes your nerves send chemical messages to the blood vessels in your penis. The arteries relax and open up to let more blood flow in; at the same time, the veins close up.

What is the difference between gray matter and white matter?

Gray matter contains the brain's processing centers, and white matter creates networks between areas of gray matter. In other words, men's brains have more areas in which to process data, and women's brains have more networks between processing centers. Some researchers believe this supports the common stereotype that men are better at science and math while women are better at language. It appears that men's brains are set up to process concrete data, while women's brains are wired for making connections.

Why don't men live longer?

In spite of being, on average, bigger and generally stronger than women, men generally don't live as long. This is true all over the world, not just in Western countries. Some researchers theorize that this is in part due to physiological differences between men and women. It may also be related to the way men and women approach relationships. Women tend to build strong support networks that they can turn to for assistance during crises. This network may help them to live longer lives [Source: Psychology Today ].

How do men and women react to anger?

In addition, how men and women compete with others or react in the face of anger seems to depend more on power than on gender. Regardless of gender, people tend to respond more directly and aggressively to people who are weaker than they are. People tend to be more subversive in expressing their anger when they are dealing with someone who is in a more powerful position [Source: Tavris ].

How many women went to college in 1980?

Women, on the other hand, have been attending college in increasing numbers. In 1980, about half of women went to college. Now, about 70 percent of women do, and about 29 percent of women have a bachelor's degree [Source: Stepp ]. In other words, men have not become less likely to go to college; women have become more likely to do so.

How many men go to college after high school?

However, research shows that this trend isn't related to fewer men deciding to go to college. About 60 percent of men apply to and enter a two- or four-year college directly after high school. This number has been increasing steadily since 1980. In the same time period, the number of men who receive a bachelor's degree has held steady at approximately 25 percent [Source: Stepp ].

How old are men when they are sports fans?

According to recent surveys, the stereotype that most men are sports fans is accurate, especially for men between the ages of 18 and 29.

How many college graduates are men?

Researchers have also taken a look at how many young men go to -- and finish -- college. Currently, only 44 percent of college graduates are men, and that number could drop to 42 percent by the end of the decade [Source: Clayton ]. In other words, women outnumber men at many schools, and there are more women than men with four-year degrees. This trend in admissions has cause some colleges to try to recruit more men to keep a balance between the genders in their classrooms.

What are the internal organs of the male reproductive system?

These external organs include the penis, scrotum and testicles. Internal organs include the vas deferens, prostate and urethra. The male reproductive system is responsible for sexual function, as well as urination. Urology 216.444.5600.

How many testes do men have?

Most men have two testes. The testes are responsible for making testosterone, the primary male sex hormone, and for producing sperm. Within the testes are coiled masses of tubes called seminiferous tubules. These tubules are responsible for producing the sperm cells through a process called spermatogenesis.

Where are the cowper glands located?

Bulbourethral glands: The bulbourethral glands, or Cowper’s glands, are pea-sized structures located on the sides of the urethra , just below the prostate gland. These glands produce a clear, slippery fluid that empties directly into the urethra. This fluid serves to lubricate the urethra and to neutralize any acidity that may be present due to residual drops of urine in the urethra.

What is LH in a male?

LH stimulates the production of testosterone, which is necessary to continue the process of spermatogenesis. Testosterone is also important in the development of male characteristics, including muscle mass and strength, fat distribution, bone mass and sex drive.

Why is testosterone decreasing in men?

This can sometimes be a result of an illness, such as diabetes. It’s unclear whether decreasing testicular function contributes to symptoms like fatigue, weakness, depression or impotence.

Which gland is responsible for ejaculation?

The fluid of the seminal vesicles makes up most of the volume of your ejaculatory fluid, or ejaculate. Prostate gland: The prostate gland is a walnut-sized structure that’s located below the urinary bladder in front of the rectum. The prostate g land contributes additional fluid to the ejaculate.

What is the glans?

The glans: This is the cone-shaped end of the penis. The glans, which is also called the head of the penis, is covered with a loose layer of skin called foreskin. This skin is sometimes removed in a procedure called circumcision.

What did Aristotle say about women?

Women, he declared, were essentially men, but had their genital organs located inside their bodies. To Aristotle (and the generations of thinkers his teachings influenced), women were nothing more than defective men. Further proof of the inferiority of women was the fact that they do not produce semen.

How is a human baby conceived?

A lot of factors must fall into place for a successful pregnancy, but, at the least, sperm from the father must unite with an egg from the mother. In Elizabethan England, people knew that you needed a man and a woman in order to create a baby, but they were a bit unclear on who needed to bring what to the party.

What is the meaning of semen in Egyptian mythology?

Semen was a key part of the Egyptian creation myth. According to Egyptian mythology, Atum, the creator god, created the world through his seminal fluid.

Why did doctors encourage orators to grow beards?

Doctors also encouraged aspiring orators to grow beards, swearing that they could ward off sore throats and thereby enhance their public speaking skills. The idea seems ludicrous today, but air pollution was out of control in the mid-18th century and people were desperate to protect themselves.

Why are Greek statues so small?

The answer is that size matters quite a bit, or at least it did to the ancient Greeks. The size of a man's junk was directly correlated to his virtue, and the smaller it was, the better. "Greeks associated small and non-erect penises with moderation, which was one of the key virtues that formed their view of ideal masculinity," classics professor Andrew Lear told Quartz.

How many people died from bronchitis in the 1800s?

An exceptionally long-lasting fog in 1873 resulted in 268 deaths from bronchitis.

What was the Romans' progressive attitude?

Since men were considered to be the superior gender, it was considered normal for a man to want to do the deed with other men. Having relations with one's wife was considered to be a man's duty in order to provide an heir, but it was common to seek out a male companion for pleasure.

What muscle pulls the testes closer to the body?

According to the National Cancer Institute, cremaster muscles are normally responsible for pulling the testes closer to the body when it gets cold or when a man is sexually aroused. And rather than responding to the knee-jerk hammer, the cremaster reflex activates when the inner part of a man's upper thigh is stroked.

Why do men's bodies stink?

Men's bodies stink. Reason? Compared with women, guys have more of the hormone androstenone in their sweat and urine. The hormone acts like a pheromone by mammals like boars to signal sexual and social information to other animals. Though humans can smell androstenone, it's unclear whether it plays a similar role for humans. Depending on your genes, however, androstenone can smell like either urine, or vanilla, according to a 2007 study in the journal Nature. Some people can't smell it all.

What muscles are wrapped around the testes?

Hit the area below your kneecap and your lower leg jerks up. But you may be surprised to find out muscles wrapped around a man's testes, called cremaster muscles , also display reflexes; though if you hit the surrounding area you probably won't get the response you're looking for.

What are the weak spots in the abdomen?

There are several kinds of hernias, according to the U.S. National Library of Medicine, depending on where they form in the abdomen. But inguinal hernias, those that extend into either side of the groin, are more common in men than in women. Weak spots in the inguinal ring, the entrance to a canal housing arteries and nerves that run to the testes, allow fat or parts of the small intestine to slip through, creating a bulge in the groin (and not the good kind).

What is the inguinal ring?

Weak spots in the inguinal ring, the entrance to a canal housing arteries and nerves that run to the testes, allow fat or parts of the small intestine to slip through, creating a bulge in the groin (and not the good kind). Though women also have an inguinal ring and canals, they aren't as large as those in men.

What cells are susceptible to HIV?

Cells called Langerhans cells found in the mucous membrane of the foreskin are susceptible to HIV infection and can serve as a point of entry to the body for the virus. WHO studies have shown that circumcision reduces the risk of heterosexually acquired HIV in men by 60 percent.

What does looking under the hood of a man's body reveal?

His Body. Looking under the hood of the male body reveals more than a simple sex-driven, sperm-carrying system. In fact, scientists are still trying to decipher some of the mysteries of the male physique. Here are some wild facts, and unknowns, about a guy's body, from his other brain and the male G-spot to lactating man-breasts and more.

The science behind what makes a body attractive

So what is it that makes these bodies actually look good? Is there an objective measure of what is aesthetic?

How is the golden ratio relevant to building a perfect body?

Eugen Sandow was known to take measurements of greek statues in order to understand the proportions he needed to build for his own body. Hence it is no coincidence that he ended up looking like one.

Quantifying the grecian ideal

To use Dr. Butt’s research, you would first have to calculate your ideal waist size at a lean bodyfat of under 15%. Here is a chart so you can estimate how lean you are currently.

Now that you have the numbers, what do you do with them?

Building the perfect body involves more than performing mindless workouts hour after hour at the gym and guzzling down protein shakes. This might work if you were born with stellar genetics that just let you build muscle in all the right places in just the right amounts. But for the rest of us, we need a plan of action.

Final words

While the Grecian Ideal gives us a goal to strive towards, it isn’t something set in stone. As in my case, I haven’t been able to grow my forearms beyond the 11 inch mark no matter what I do. Also, I have a really weak chest which doesn’t seem to grow beyond the 40 inch mark.

What organs do men use for sex?

Penis – the male organ used for sex. It’s filled with spongy tissues that fill with blood to produce an erection when a man is aroused. Bladder – the hollow, balloon-like organ that holds urine. Rectum – the bottom end of the intestines that connects to the outside of the body.

What is the role of testosterone in men?

Testosterone is the main male hormone. It causes the reproductive organs to develop, and promotes erections and sexual behavior. Testosterone also causes secondary sexual characteristics at puberty, such as a deeper voice and hair growth on the body and face.

What is the fluid that moves through the urethra and out of the penis called?

During orgasm this mixture of fluid and sperm, called semen, moves through the urethra and out of the tip of the penis.

Where does sperm travel?

The sperm must travel through the epididymis to mature. Vas deferens – the tubes on either side of the body that mature sperm must travel through just before ejaculation. Each tube carries sperm from an epididymis into the body toward the prostate gland. Prostate gland – a walnut-shaped gland that sits in front of the rectum and below the bladder.

Which organs produce testosterone?

Testicles (testes) – the 2 oval organs inside the scrotum that produce a steady supply of hormones, mostly testosterone. They also make millions of sperm each day. Epididymis – a very thin, long coiled tube that sits on top of and behind each testicle. The sperm must travel through the epididymis to mature.

Where is the sperm mixed with fluids?

The prostate surrounds the urethra. This gland is where the sperm is mixed with fluids from the prostate and the seminal vesicles. This whitish, protein-rich fluid helps to support and nourish the sperm so that they can live for some time after ejaculation.

How to adjust sexual routine when you have cancer?

Good communication is the key to adjusting your sexual routine when cancer changes your body. If you feel weak or tired and want your partner to take a more active role in touching you, say so. If some part of your body is tender or sore, you can guide your partner’s touches to avoid pain.

How does an erection occur?

When the blood vessels of the corpora cavernosa relax and open up, blood rushes in through the cavernosus arteries to fill them. The blood then gets trapped under high pressure, creating an erection.

What is the tunica albuginea?

The tunica albuginea (the membrane surrounding the corpora cavernosa), helps to trap the blood in the corpora cavernosa, sustaining the erection. Erection is reversed when muscles in the penis contract, stopping the inflow of blood and opening outflow channels.

What is the process of erection?

An erection begins with sensory and mental stimulation. During sexual arousal, nerve messages begin to stimulate the penis. Impulses from the brain and local nerves cause the muscles of the corpora cavernosa to relax, allowing blood to flow in and fill the open spaces.

What are the two chambers of the penis?

The penis is made up of: Two chambers called the corpora cavernosa, which run the length of the organ and contain a maze of blood vessels shaped like cavernous spaces (like a sponge). The urethra, or channel for urine and sperm, which runs along the underside of the corpora cavernosa.

What tissue surrounds the urethra?

Erectile tissue, which surrounds the urethra, two main arteries and several veins and nerves.

What Is Ejaculation?

When you're aroused, tubes called the vas deferens squeeze sperm from the testes toward the back of the urethra. The seminal vesicles also release fluid there.

What is the longest part of the penis?

The shaft is the longest part of it. The head or glans is at the end of the shaft. The opening at the tip of the head, where urine and semen come out, is called the meatus. Inside, two cylinder-shaped chambers called the corpora cavernosa run the length of the penis.

Where does urine flow through?

The urethra, the tube that urine and semen flow through, runs along the underside of them, in the spongy tissue of the corpus spongiosum. Two main arteries (one in each of the corpora cavernosa) and several veins move blood in and out. Nerves relay messages to and from other parts of your body.

What stage of puberty does a boy's voice change?

Stage four of male puberty commonly takes place when a boy is around 14 or 15 years old. Hair begins showing up in the armpits and on the ...

When does puberty start?

A boy's muscle fibers actually change during puberty. The third stage of male puberty occurs around age 13 or 14, but frequently as early as 11 or late as 16. Pubic hair begins to grow darker and fuller, and the penis now begins to grow in length.

Where does pubic hair spread?

Pubic hair will spread out to the inner thighs and lower stomach. By this stage of puberty, boys -- make that young men -- will be shaving, and their pubic hair and sex organs will look fully developed.

how the male body works
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