Male Reproductive System

Question 1

_ is the study of the male reproductive organ. The male reproductive system consists of both external and internal divisions

Answer 1

Andrology

Question 2

Male External Structures:

Answer 2

Scrotum
Testes
Penis

Question 3

_ - is a rugated, skin-covered, muscular pouch suspended the perineum. Its functions are to support the testes and help regulate the temperature of sperm.

Answer 3

Scrotum

Question 4

Testes- are two _ glands, _ wide that rest in the scrotum. Each testes is encased by a protective white fibrous capsule and is composed of a number of lobules. Although spermatozoa are produced in the testes, they reach maturity through a complex sequence of events. _ in men is responsible for the release of androgen-binding protein (ABP). _ is responsible for the release of testosterone from the testes. One testes is slightly larger than the other and is suspended slightly lower in the scrotum than the other. It feel firm and smooth and are egg shaped.

Answer 4

ovoid
2-3 cm
FSH
LH

Question 5

Penis- is composed of _ cylindrical masses of erectile tissue in the penis shaft. The urethra passes through these layers of tissue, allowing the penis to serve as both the outlet for the urinary and reproductive tracts in men. The parts of the penis are the_(4). The tissues that make up the penis include the_(4).

Answer 5

three
base, shaft, glans, and foreskin
dorsal nerve, blood vessels, connective tissue, anderectile tissue(corpus cavernosum andcorpus spongiosum)

Question 6

_- retractable casing of skin that protects the nerve-sensitive glans at birth (prepuce tissue removed surgically- circumcision)

Answer 6

Prepuce

Question 7

Male Internal Structures:

Answer 7

Epididymis
Vas deferens (ductus deferens)
Seminal vesicles
Prostate gland
Bulbourethral glands (Cowper’s gland)
Urethra

Question 8

_- a highly convoluted ductbehind thetestes, along which sperm passes to thevasdeferens.

Answer 8

Epididymis

Question 9

Epididymis- a highly convoluted ductbehind thetestes, along which sperm passes to thevasdeferens. It is _ long. Some sperm are stored in the epididymis, and part of alkaline fluid (seme or seminal fluid that contains a basic sugar and protein) that will surround sperm at maturity is produced by the cells lining of epididymis. Sperm are immobile and incapable of fertilization as they passes through or stored at the epididymis level. It takes at least _ days for them to travel the length of the tube and a total of _ days for them to reach full maturity.

Answer 9

20ft
12-20
65-75

Question 10

_ (complete absence of seminal fluid emission)

Answer 10

Aspermia

Question 11

_ ( fewer than 20 million sperm per milliliter)

Answer 11

Oligospermia

Question 12

Normal sperm densities range from_ million to greater than _ million sperm per milliliter of semen. You are considered to have a low sperm count if you have fewer than _ million sperm per milliliter or less than _ million sperm total per ejaculate.

Answer 12

15
200
15
39

Question 13

_ - hollow tube surrounded by arteries and veins and protected by a thick fibrous coating.

Answer 13

Vas deferens (ductus deferens)

Question 14

Vas deferens (ductus deferens)- hollow tube surrounded by arteries and veins and protected by a thick fibrous coating. These structures are referred to as the _. It carries sperm from the epididymis through the inguinal canal into the abdominal cavity, where it ends at the seminal vesicles and the ejaculatory ducts below the bladder. Sperm complete maturation as they pass through the _. They are still not mobile at this point, however, probably because of fairly acidic medium of semen.

Answer 14

spermatic cord
vas deferens

Question 15

_- are two convoluted pouches that lie along the lower portion of the bladder and empty into the urethra by ejaculatory ducts.

Answer 15

Seminal vesicles

Question 16

Seminal vesicles- are two convoluted pouches that lie along the lower portion of the bladder and empty into the urethra by ejaculatory ducts. These glands secrete a _ with a high sugar, protein and prostaglandin content. Sperm become increasingly motile because this added fluid. Sperm become increasingly motile because this added fluid surrounds them with a more favorable pH environment.

Answer 16

viscous alkaline liquid

Question 17

_- is a chest nut-sized gland that lies just below the bladder and allows the urethra to pass through the center of it.

Answer 17

Prostate gland

Question 18

Prostate gland- is a chest nut-sized gland that lies just below the bladder and allows the urethra to pass through the center of it. The gland’s purpose is to _, which, when added to the secretion from the seminal vesicles, further protects sperm by increasing the naturally low pH level of the urethra.

Answer 18

secrete a thin, alkaline fluid

Question 19

_ – lie beside the prostate gland and empty by short ducts into the urethra.

Answer 19

Bulbourethral glands (Cowper’s gland)

Question 20

Bulbourethral glands (Cowper’s gland) – lie beside the prostate gland and empty by short ducts into the urethra. They supply one more source of alkaline fluid to help ensure the safe passage of spermatozoa. Semen, therefore, is derived from the prostate gland (), the seminal vesicles (), the epididymis () and the bulbourethral glands ().

Answer 20

60%
30%
5%
5%

Question 21

_- is a hollow tube leading from the base of the bladder, which after passing through the prostate gland, continues to the outside through the shaft and glans of the penis. It is about _ long. It is line with with _.

Answer 21

Urethra
8 in (18-20 cm)
mucous membrane