The structures in the shaft of the penis that engorge with blood during sexual arousal.
A highly sensitive think strip of skin that connects the glans to the shaft on the underside of the penis.
A cord attached to the testis that contains the vas deferens, blood vessels, nerves, and cremasteric muscle fibers.
Cells located between the seminiferous tubules that are the major source of androgen in males.
A condition in which the testes fail to descend from the abdominal cavity to the scrotal sac.
What happens to the testicles what the environment is hot.
heat causes the scrotal skin to relax and the testes to descend.
Which testicle hangs lower?
The left hangs lower (because the left spermatic cord is generally lower than the right testis.
2 Structures within the testicles that are the site of sperm production.
1. Seminiferous Tubules
3 Structures that supply the fluid portion of semen.
1. Seminal Vesicles (provides most fluid)
2. Prostate Gland
3. Cowper's Glands
Small glands adjacent to the terminals of the vas deferens that secrete an alkaline fluid (conductive to sperm motility) that constitutes the greatest portion of the volume of seminal fluid released during ejaculation.
A gland located at the base of the bladder that produces about 30% of the seminal fluid released during ejaculation.
Two pea-sized glands located alongside the base of the urethra in the male that secrete an alkaline fluid during sexual arousal.
A cheesy substance of glandular secretions and skin cells that sometimes accumulates under the foreskin of the penis or hood of the clitorus.
The medical specialty dealing with reproductive health and genital diseases of the male and urinary tract diseases in both sexes.
Average volume of seminal fluid produced by a man as a result of ejaculation
Roughly 1 teaspoon on average
What is the physiologic process that causes an erection?
When a male becomes sexually excited, the nervous system sends out messages that cause expansion of the arteries leading to the 3 erectile cylinders (cavernous bodies-2, 1 spongy body) in the penis. As a result, the rate of blood flow into these parallel cylinders increases rapidly. Because blood flowing out of the penis through veins cannot keep up with the inflow, it accumulat3es in the spongelike tissues of the erectile cylinders, causing erection. The penis remains erect until the messages from the nervous system stop and the inflow of blood returns to normal.
The first stage of male orgasm (ejaculation), in which the semnial fluid is gathered in the uretheral bulb.
The second stage of male orgasm (ejaculation), during which the semen is expelled from the penis by muscular contractions.
The purpose of for the sugar secreted by the seminal vesicles.
seems to contribute to sperm nutrition and motility.
3 adverse conditions that occur less frequently in circumcised males.
1. Childhood urinary tract infections
2. adult penile cancer
3. genital wart infections
4. increased protection against HIV, the virus that causes AIDS
3 arguments that have been raised against routine circumcision.
1. the foreskin could serve some important function yet to be determined.
2. some investigators have expressed concern that sexual function may be altered by excising the foreskin
3. traumatic for a newborn and invites possible surgical complications.
condition that occurs in 50% of men aged 50-70 and causes problems with urine flow.
Benign Prostatic Hyperplasia