male reproductive system

Question 1

function?

Answer 1

to produce spermatocytes and male sex hormones.

Question 2

Internal organs?

Answer 2

testis, epididymis, deferens duct, seminal vesicular and prostate.

Question 3

External organs ?

Answer 3

scrotum, penis and urethra masculine.

Question 4

describe testis. location ,function, shape.

Answer 4

The male gonads. Combined endocrine and exocrine glands that produce sex hormones and spermatozoids. The testis is in oval shaped and slightly flattened. They suspended outside of the abdomen cavity, Located inside a sac that made from skin and smooth muscle, called the scrotum.

Question 5

two facts about testis u need to remember:

Answer 5

1. The left testis is usually suspended lower than the right so the two are not compressed against each other.
   2.human testis reside in the scrotum, because testis cannot produce spermatozoids at the core body temperature of 37o, they must by held at 35o

Question 6

mechanism of regulating temperature of testis

Answer 6

The cremaster muscle – strips of the internal abdominal oblique muscle that enmesh the spermatic cord. When it is cold, the cremaster contracts and draws the testes closer to the body to keep them warm. When it is warm, the cremaster relaxes and testes are suspended farther from the body

Question 7

tunica vaginalis:

Answer 7

Its anterior and lateral surfaces are covered by the tunica vaginalis a saccular extension of the peritoneum.

Question 8

The testis itself has a white fibrous capsule called

Answer 8

tunica albugine

Question 9

Stroma (connective tissue) extend from the …. into the …. of the testis and dividing it to 200-300 wedge shaped lobules.

Answer 9

1. capsule
   2.parenchyma

Question 10

each lobule contains:

Answer 10

1-3 seminiferous tubules

Question 11

seminefrous tubules are:

Answer 11

thin ducts in which spermatozoids are produced.

Question 12

structure of seminefrous tubules

Answer 12

The wall of the tubules contain spermatogene epithelium for the spermatocytes production.

Question 13

what cells can we find between the seminefrous tubules, what’s their functions?

Answer 13

Between the seminiferous tubules there are brunch of interstitial cells that produce testosterone, the leydig cells.

Question 14

seminiferous tubules lead into tubules network that called

Answer 14

rete testis

Question 15

where is rete testis found

Answer 15

rete testis is embedded in the capsule testis on the posterior side (mediastinum testis).

Question 16

what’s mediastinum’s function

Answer 16

It supports the rete testis and blood and lymphatic vessels of the testis in their passage into and out of the substance of the gland.

Question 17

Spermatozoids partially mature in :

Answer 17

the rate testis (do not swim while they in the male body)

Question 18

after the testis :

Answer 18

spermatozoids leaves the testis and travel through series of spermatic ducts to reach the urethra

Question 19

what are the ducts?

Answer 19

Efferent ductules, epididymis and its duct, vas deferens duct and ejaculatory duct.

Question 20

first duct and its function

Answer 20

Efferent ductules – 12 small efferent ductules that arise from the rate testis and carry spermatozoids to the epididymis (into the head region of the epididymis).

Question 21

second duct and its function

Answer 21

Epididymis – a site of storage and maturation of the spermatozoids

Question 22

epididymis structure and location

Answer 22

It attaches to the posterior side of the testis and consists of:
Head – at the superior end.
Body – long middle.
Tail – slender at inferior end of testis.

Question 23

The duct of the epididymis is single coiled duct that …

Answer 23

reabsorbs about 90% of the fluid that is secreted by the testis.

Question 24

After 20 days of maturation of the spermatozoids in the head and body of the epididymis,

Answer 24

the spermatozoids reach the tail of epididymis. And they are stored there, the storage is for 40-60 days, if they stay longer than that they are reabsorbed by the epididymis.

Question 25

the epididymis duct turn 180o and become the

Answer 25

vas deferens duct

Question 26

what is the vas deferens duct, pathway steps?

Answer 26

this is a muscular tube that pass upward from the scrotum and travels through the inguinal canal to enter the pelvic cavity. After passing between the urinary bladder and ureter, it turns downward behind the bladder and widens to form the ampulla.
It ends when it units with the seminal vesicle (the seminal glands, a pair tubular glands that located in the pelvis. They secrete fluid that partly composes the semen)

Question 27

vas deferens structure:

Answer 27

The duct has very narrow lumen and thick wall of smooth muscle that innervated by sympathetic nerves.

Question 28

vas deferens function

Answer 28

it transport mature sperm to the urethra in preparation for ejaculation

Question 29

why is skin

Question 30

seminal vesicle function

Answer 30

attaches to vas deferens near the base of bladder and produce sugar rich fluid that is fructose that provides sperm with energy and motility. it drains into the ejacuation duct.

Question 31

The secretory portion is convoluted duct with branches that form a complex labyrinth.
Its duct called: excretorius duct, and it drains into the ejaculatory duct.

Answer 31

true

Question 32

Ejaculatory duct

Answer 32

the connection of vas deferens duct and seminal vesicle create the ejaculatory duct. It pass through the prostate and drains into the prostatic part of the urethra.

Question 33

prostate gland:

Answer 33

located below the urniary bladder that contributes additional fluid to the ejaculate, which nourish the sperm

Question 34

bulbourethral gland

Answer 34

located on both sides of urethra just below the postate gland, produces a clear fluid that empties into the urethra to lubricate it and neutralize acidity that may be present due to drops of urine.

Question 35

urethra

Answer 35

the tube that carries urine and semen outside the body.

Question 36

when penis is erect, flow of urine is blocked from urethra allowing:

Answer 36

only semen to be ejaculated at orgasm

Question 37

structure of sperm

Answer 37

head, acrosome containing enzymes to penetrate an egg body containing mitochondria to provide energy, tail(flagella).

Question 38

penis function

Answer 38

erves to deposit semen into the vagina.

Question 39

penis structure

Answer 39

Half is internal root and half is external shaft and glans.
The external portion is about 10-20 cm, the glans is the expanded head at the distal end of the penis with external meatus at its tip.

Question 40

SEVEN UP

Answer 40

S- seminefrous tubules
E- epididymis
V- van deferens
E- ejaculatory duct
N- nothing

U- urethra
p- penis

Question 41

why is the skin loose

Answer 41

The skin is loosely attached to the shaft and allowing expansion during erection, the skin continues over the glans as foreskin.

Question 42

On the penis shaft there are:

Answer 42

sebaceous glands that secretes smegma, this is oily moisture substance that helps keep the glans moist and relieve sexual intercourse by acting as lubricant.

Question 43

3 elongated erectile bodies that bounded by tunica albuginea (fibrous capsule)

Answer 43

1. Single corpus spongiosum – passes along the ventral side of the penis and encloses urethra. Originates as bulb from pelvic floor and expands at the distal end to fill the glans.
2. Two corpora cavernosa – separated by a septum, diverge as 2 arms (crus) that attach to the symphysis pubic.

3.The erectile tissues are spongy and contain blood sinuses (lacunae). The partitions between lacunas are trabeculae that composed of connective tissue and smooth muscle.