Primary male sex organs
Each testis is found inside its own pouch on one side of the scrotum and is connected to the abdomen by a spermatic cord and cremaster muscle. However, replacing male hormones can make prostate cancer worse, and may make atherosclerosis hardening of the arteries worse, also. The opening of the urethra, the tube that transports semen and urine, is at the tip of the penis. What are the internal male reproductive organs? The spermatid cells then go through a process known as spermiogenesis where they grow a flagellum and develop the structures of the sperm head. The zygote cell begins cell division to form an embryo. The urethra, which carries the ejaculate to be expelled during orgasm, runs through the center of the prostate gland.
Penis — The penis is the male organ for sexual intercourse. The urethra is the tube that carries urine from the bladder to outside of the body. It functions in the carrying and storage of the sperm cells that are produced in the testes. These glands produce a clear, slippery fluid that empties directly into the urethra. The scrotum has a protective function and acts as a climate control system for the testes. The scrotum is made up of 2 side-by-side pouches with a testis located in each pouch. Physiology of the Male Reproductive System Spermatogenesis Spermatogenesis is the process of producing sperm and takes place in the testes and epididymis of adult males. The sperm released during ejaculation must first swim through the vagina and uterus and into the fallopian tubes where they may find an oocyte. In males, it has the additional function of expelling ejaculating semen when the man reaches orgasm. The smooth muscles of the walls of the ductus deferens are used to move sperm towards the ejaculatory duct through peristalsis. The seminal vesicles are about 2 inches in length and located posterior to the urinary bladder and anterior to the rectum. Also called Cowper's glands, these are pea-sized structures located on the sides of the urethra just below the prostate gland. The function of the penis is to deliver semen into the vagina during sexual intercourse. The secondary spermatocytes go through meiosis II to form 4 haploid spermatid cells. Anatomy of the Male Reproductive System Scrotum The scrotum is a sac-like organ made of skin and muscles that houses the testes. 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. Testosterone is responsible for the development of male characteristics, including muscle mass and strength, fat distribution, bone mass, facial hair growth, voice change, and sex drive. These external structures include the penis, the scrotum, and the testicles. Within the testes are coiled masses of tubes called seminiferous tubules. The liquid also contains fructose to feed sperm cells so that they survive long enough to fertilize the oocyte. The prostate gland is a walnut-sized structure that is located below the urinary bladder in front of the rectum. The entire male reproductive system is dependent on hormones, which are chemicals that regulate the activity of many different types of cells or organs. On the other hand, subtle changes in the function of the testes may occur as early as 45 to 50 years of age, and more dramatically after the age of This tissue contains thousands of large spaces that fill with blood when the man is sexually aroused. The purpose of the organs of the male reproductive system is to perform the following functions: These are formed by the fusion of the vas deferens and the seminal vesicles see below. The fluid of the seminal vesicles makes up most of the volume of a man's ejaculatory fluid, or ejaculate.
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