Male Reprodutive System Flashcards Preview

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Flashcards in Male Reprodutive System Deck (64):
1

Functions of male reproductive tract

Production of spermatozoa, delivery of semen and production of androgens

2

What do the testes take with them from the peritoneum

Parietal and viscera tunica vaginalis

3

What covers the testis

A tough fibrous capsule known as the tunica albugina

4

What send septa into the testis

Tunica vasculosa

5

How many seminifierous tubules are in each lobule

1-3

6

What connects the seminiferous tubule loops

Straight tubules called tubuli recti

7

What is the network that the seminiferous tubule connect into called

Rete testis

8

Function of rete testis

Carry sperm out of the testis to the epididymis

9

What occurs in the epididymis

Sperm mature and are temporarily stored

10

What is the epididymis continuous with

Ductus deferenes

11

What is the function of the ductus deferenes

Convey sperm away from the scrotum along the spermatic cord

12

What lines the seminiferous tubules

Seminiferous epithlium

13

What makes up seminiferous lining

Various germ cells and support cells called sertoli cells

14

What is the seminiferous lining bound by

Basal lamina, a lamina propria of connective tissue and myofibroblasts

15

What is found in the interstices between the tubules

Connective tissue with clusters of Leydig cells

16

What do lLeydig cells secrete

Testosterone

17

what is spermatogenesis

The process of proliferation and maturation tat transforms diploid spermatogonia into haploid spermatozoa

18

how long does spermatogenesis take

70 days

19

Whta do Type A dark spermatogonia form

A pool of self-renewing stem cells or type A pale spermatogonia

20

what forms type B spermatogonia

Type A pale spermatogonia after undergoing mitotic division

21

From type B spermatogonia to spermatozoa

Type B under go mitosis = primary spermatocytes
PS then undergo meiosis I = secondary spermatocytes
SS rapidly undergo meiosis II = spermatids
Spermatids undergo maturation to give spermatozoa

22

What is the name of the maturation process that spermatids undergo

spermiogenesis

23

what is incompletre is all cell divisions after type B spermatogonia onwards

Cytokinesis

24

what does the incomple cytokinesis cause

a clonal syncitium to form

25

how long does meiosis I take

around 3 weeks

26

how long does meiosis II take

less that one day

27

what are the support cells within the seminiferous tubules

Sertoli cells

28

function of sertoli cells

support the newly developed spermatozoa and controlling how the process proceeds

29

where does sertoli cells extend from/to

The basal lamina to the lumen of the tubule

30

What do the sertoli cells do

regulate spermatogenesis and spermiogenesis, control Leydig cells, produce tubular fluid, phagocytose discarded spermatid cytoplasm and via tight junctions, divide the tubule epithelium into two components

31

what are the two compartments created by the sertoli cell tight junctions

adluminal and basal compartments

32

what is within the adluminal compartment

all other developing cells

33

what does the basal memebrane contain

spermatogonia and early spermatocytes

34

what is within the acrosomal cap

enzymes that allow access through the corona radiata and zona pellucida

35

what occurs to the nucleus of the smeratid during maturation

it elongates

36

how is the flagellum of the sperm formed

one centriole elongates

37

what is a residual body

the released cytoplasm from the spermatid

38

what happens to the residual body

it is phagocytosed by the sertoli cells

39

what is spermination

the release of the spermatozoa by the sertoli cells into the lumen

40

once released from the sertoli cells where do the spermatozoa go

into the rete testis and epididymis by fluid flow and peristalsis

41

when are the spermatozoa capable of swimming and fertilisation

during their passage through the epididymis

42

What is between the seminiferous tubules

connective tissue, blood vessels, nerves and lymphatics

43

what is abundant in Leydig cells

smooth endoplasmic reticulum

44

what do leydig cells respond to

lutenising hormone

45

what secretes lutenising hormone

pituitary

46

where does testosterone act upon

the seminiferous tubules and it also enters the circulation

47

what do the seminiferous tubules end as

straight tubules known as tubuli recti

48

what lines seminiferous tubules

sertoli cells

49

where is the rete testis found

in the mediastinum of the testis

50

what are the rete testis channels lined by

cilliated simple cuboidal epithelium

51

where does the spermatozoa travel to from the rete testis

efferent ducts

52

what lines the efferent ducts

ciliated epithelium that varies form cuboidal to pseudostratified columnar

53

what does smooth muscle surrounding the efferent ducts form

thin circular sheath

54

what is the epididymis

a highly coiled tubule

55

what lines the epididymis

pseudostratified columar epithelium with sterocilia

56

what does the fluted profile of the lumen of the vas deferens allow

expansion during ejaculation

57

what surrounds the epithelium of the epididymis

smooth muscle cells

58

what happens within the epididymis

sperm are stored and mature

59

what lines the vas deferens

pseudostratified columnar epithelium with sterocilia

60

what are sterocilia

giant microvili

61

what is the epithlieum of the vas deferens surrounded by

lamina propria and 3 coats of smooth muscle

62

smooth muscle of the vas deferens

inner and outer longitudinal layers and a central circular layer

63

what innervated the smooth muscle of the vas deferens

sympathetic nervous system

64

what is within the spermatic cord

the pampiniform plexus