Male Reproductive System

Question 1

Scrotum

Answer 1

Behind the penis
Pouch of skin and muscles and fibrous tissue
Split into two compartments containing 1 testis and 1 epididymis

Question 2

Testes

Answer 2

Suspended in the scrotum

Question 3

Tunica vaginalis

Answer 3

Outer covering of membrane formed from peritoneum

Question 4

Tunica albugineau

Answer 4

Fibrous covering divided into lobes by septa

Question 5

Tunica vasculosa

Answer 5

Network of capillaries

Question 6

What is created in Seminiferous tubules

Answer 6

Where sperm cells are created

Question 7

Leydig cells

Answer 7

Lies betweeen S.T
produces testosterone after puberty

Question 8

Epididymis

Answer 8

Single highly convoluted tubule forming mass at upper pole of testis

Question 9

Vans deferens

Answer 9

Duct formed from epididymis as it leaves the scrotum

Question 10

Spermatic cord

Answer 10

Suspends testes in scrotum
Contains blood and lymph vessels

Question 11

Blood supply to testes

Answer 11

Testicular arteries

Question 12

Seminal vesicles location

Answer 12

Lies at posterior base of bladder
Joins van deferens by small duct to form ejaculatory duct which then joins the urethra

Question 13

Benefit of seminal fluid

Answer 13

Alkaline
Neutralises vaginas acidic environment during intercourse
Coagulation of semen after intercourse

Question 14

Prostate

Answer 14

Doughnut shaped gland

Question 15

Function of prostate

Answer 15

Produces milky white fluid
Acidic in nature to help semen coagulate

Question 16

Bulbourethral gland

Answer 16

Inferior to prostate gland
Responsible for producing fluid that lubricates penis before intercourse

Question 17

Penis

Answer 17

External male organ
Passage for ejaculation and urine
Root in perenium
Has three columns of erectile tissues

Question 18

Corpora carvernosa

Answer 18

2 lateral columns

Question 19

Glans penis

Answer 19

Covered with foreskin

Question 20

Fundiform and suspensory ligaments

Answer 20

Supports the penis

(Sling like)

Question 21

Penis nerve supply

Answer 21

Autonomic and somatic

Question 22

Erection

Answer 22

Parasympathetic stimulus
Increase of blood flow to fill corpus cavernosa

Question 23

Ejaculation

Answer 23

Sympathetic reflux
Bladder sphincter closes

Question 24

First phase of ejaculation

Answer 24

Vans deferens contract to squeeze sperm towards the base and mixes with secretions from seminal vesicles forming semen

Question 25

Second phase of ejaculation

Answer 25

Muscle at the base of the penis contracts and forces sperm out in upto 5 spurts

Question 26

Male puberty

Answer 26

From 12-13 Hypothalamus releases GnRH (gonadotropin releasing hormone) Stimulates the release of FSH and LH

Question 27

Male secondary sex characteristics

Answer 27

Body hair Muscle and skeletal growth Pigmentation of external genitalia Voice breaks

Question 28

Spermatogenesis

Answer 28

Formation of male gametes in the testes Primordial germ cells (foetal) differentiate into spermatogonia

Question 29

What do Spermatogonia do until puberty?

Answer 29

Remains dormant up until puberty

Question 30

Sperm features

Answer 30

0.017cm small Swim upto 30mph Survival 2-5 days

Question 31

Acrosome

Answer 31

Head Contains enzymes to penetrate oocyte Nucleus that contains chromosomes

Question 32

What does the Midpiece contain?

Answer 32

Contains mitochondria to provide ATP

Question 33

Flagellum

Answer 33

Tail for swimming

Question 34

Fertilisation method

Answer 34

1) spermatogonia makes contact with egg and acts with zone pellucida (outside layer of egg) 2)reacts with perivitelline space and plasma membrane of egg and sperm fuse 3) sperms nucleus enters the egg