Male/Female Similarities

As we conclude this section on physiology, it is interesting to realize that the female and the male sex organs develop out of the same structures. The most obvious of these similar structures are the clitoris and the penis. The clitoris repeats—reduced and modified—the chief elements of the male penis. The spongy tissues of the [...]

Semen.

Just past the prostate are the two openings of the glands that secrete mucus to lubricate the urinary canal for easy movement of the semen during ejaculation. Some of this lubricating fluid may escape from the penis during the erection before orgasm. The fluid, with the secretions from the female vagina, helps provide easier entry [...]

Many times enlargement of the prostate does not pose a problem.

Prostate. The prostate gland, approximately the size of a walnut, is located at the base of the urinary bladder. This gland literally encircles the urethra, the tube emptying the bladder, which is the only exit for urine from the bladder. Because of the intimate anatomic relationship between the prostate, the bladder neck, and the urethra, [...]

Testicles

Testicles. The two testicles are normally carried in the scrotum—a double sac divided by a membrane. Each testicle is about the size and shape of the female ovary. Its main structure is a mass of tiny, coiled tubes in which the male reproductive cells, called sperm cells, are produced. The new sperm move off into [...]

The most obvious fact about the penis

HTML clipboardPenis. The most obvious fact about the penis is that it can be distended with blood under mental or physical stimulus, so that it becomes stiff or erect. The penis is made up of three columns of spongy erectile tissue—the middle one containing the urethra. The head of the penis is called the glans [...]

The Male Reproductive System

The Male Reproductive System To aid in understanding the anatomy of the male sex organs, please refer to the accompanying drawings. There are three basic male sex organs: 1. The penis, with its glands and tissues 2. The testicles, also called the gonads or sex glands 3. The prostate gland, and seminal vesicles

Birth is remarkable — all the more…

Birth is remarkable — all the more so because the reproductive organs, having performed an enormous task, very soon return to their former size and functions. Within about a month they are ready to begin again. The first ovulation after delivery is likely to occur about this time. Although nursing may hasten the return of [...]

The Nine Months of Pregnancy

By the end of the first week, the cell cluster comes to rest in the upper part of the uterus, where it clings and takes root. The nesting cluster finds nourishment in the lining of the uterus, prepared during the menstrual cycle. Toward the end of the second week, the cluster begins to form an [...]

Fertilization of the Egg

Millions of sperm begin the journey, but a comparative few reach the tiny egg in the oviduct. Some sperm attach to the membrane, which covers the egg, and activate it, so that finally one sperm may enter and fertilize. The one sperm that enters the egg loses its tail, which is absorbed, and its head [...]

The round egg of the female. The male spermatozoon.

The round egg of the female is the largest single human cell, yet it is smaller than a dot (). The male spermatozoon, sperm for short, is similar in shape to a comma (,). It is much smaller than the egg, so much smaller that 2,500 would be needed to cover a comma—and all the [...]