Male Reproductive System

pass into the uterus. If this happens, the embryo may implant in the tube causing a tubal

Pink colored spermatozoa (sperm) were surrounded by spermatocytes (formed after meiosis of spermatogonia) and spermotigonia (precursor to sperm)

The gonads are the male and female reproductive organs, the testes (males) and ovaries (females). The testes and ovaries produce androgens (testosterone) and estrogens, these hormones affect aggressiveness, mood, and sexual interest and behavior. Higher levels of these hormones have been shown to promote aggressiveness in both sexes (Morris and Maisto, 2002).

49.) Scrotum: Is the sac that is located below the penis and it contains the testicle. The numerous glands in the skin of the scrotum produce sweat. These responses help regulate the temperature of the testicles. The temperature in the scrotum is 2-3 degrees centigrade lower than in the interior of the body. Sperm can be produced only at a temperature several degrees lower than the normal body temperature, and any variation can result in sterility.

dia in EUROPE show more nudity than in the united states Chapter 2 Clitoris- a small, elongated erectile structure in women that develops from the same embryonic tissue as the penis Cowper’s Gland- two pea-shaped structures located beneath the prostate gland in men that secrete a few drops of an alkaline fluid prior to orgasm Hymen- the thin membrane that partially covers the vaginal opening in many sexually inexperienced women G Spot- a small, sensitive area on the front wall of the vagina found in about 10% of women Penis- the male organ for sexual intercourse and the passageway for sperm and urine Scrotum- the pouch beneath the penis that contains testicles Vuvla- external female genitalia, including the mons veneris, labia majora, labia minora, clitoris, vaginal opening, urethral opening

This complex organ can be found in upper right side of the abdomen. It is unique because it is a dual functioning organ. The first function is to control the body’s blood sugar level. The second function is to secrete insulin and glucagon. Lastly, I studied the testes of the fetal pig, which I found at the end of the scrotum under the skin. The teste are a key part in the process of secreting testosterone. After completing this section I began to dissect the last system of the pig.

The testes are the gamete-producing organs of the male reproductive system. 3. Ejaculation is the forceful expulsion of semen from the penis. 4. Seminiferous tubules are the specialized compartments of the testes in which sperm are produced.

A female frog has its ovary attached dorsally on one side and is suspended into the coelom by a mesentry, which is a coiled oviduct with a funnel-shaped opening called the ostium at its anterior end, and its uterus being an enlargement near the cloaca. Meanwhile, the male frog has two tests which each suspend from the dorsal abdominal wall by a mesentery, and the several vasa efferentia are small ducts that carry sperm from the testes into the kidneys followed by cloaca by the ureters, also known as the genital ducts. The mating position of frogs is called the amplexus, a position where the male grasps onto the female and fertilizes the eggs as they are being laid by the

Semen is the male reproductive fluid, containing spermatozoa in suspension. Sperm is a male reproductive cell. Prostate is a gland surrounding the neck of the bladder in male mammals and releasing prostatic fluid. Urethra is a duct by which urine is convey out of the body from the bladder, and which in male vertebrates also conveys semen. Penis is the male genital organ of higher vertebrates, carrying the duct for the transfer of sperm during copulation. Glans is the head of a penis. A shaft is the cylindrical part of the penis between the scrotum and head. Seminiferous tubules is any of the numerous long convoluted tubules in the testis which are the sites where spermatozoa mature. Seminal vesicles is each of a pair of glands that open into the vas deferens near its junction with the urethra and secrete many of the components of semen. Bladder is a membranous sac in human and other animals, which urine is collected for excretion.

Testosterone in the male is produced mainly in the testes and a small amount is

The urethral opening is located on the underneath the penis, instead of the tip, and may exit the penis anywhere along its shaft as high as the scrotum.

• Testosterone - a male hormone produced mainly in the testes. Testosterone causes the development of male sex characteristics, such as a deep voice and a beard. It also strengthens muscles and bone mass.

The male reproductive system is divided into two categories: internal and external reproductive organs. External organs are outside the body and internal organs are inside the body.

sperm as a superior and the egg as an expelling organ part. Moreover, the features of the egg and

The scrotum is a loose sac of skin and superficial fascia outside the abdominopelvic cavity, fascia, and smooth muscle that encloses and supports the testes outside the body at an optimum temperature for the production of sperm, about 3 degrees below body temperature. When the temperature is too low, the spermatic cord (This cord is surrounded by skeletal muscle and suspends the testes) tightens thus pulling the testes closer to the body. When the temperature is too hot, the cord relaxes resulting in the testes moving further away from the body. The muscles responsible for this are Cremaster muscles, which extend from the internal obliques and elevate the testes. Most men might have noticed that when this happens, the scrotum skin wrinkles. This is due to the smooth muscle in the