Chapter 28: Male Reproductive System Flashcards Preview

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Flashcards in Chapter 28: Male Reproductive System Deck (64):
1

What ar ethe primary sex organs of the male

testes 

2

What are the accessory organs of the male

set of ducts and tubules leading from the testes to the penis

3

What is the organ of copulation?

penis

4

_______ is a skin-covered sac that provides the testes with a cooler environment than body temperature

Scrotum 

5

At what temperature do sperm develop successfully ?

oC below normal body temperature 

6

What is the scrotum homologous to in the female

labia majora

7

______ separates the two scrotal sacs

raphe

8

What is the layer of smooth muscle that is part of the wall of the scrotum called 

dartos muscle

9

The spermatic cord originates at the _______ ______

inguinal canal

10

What does the spermatic cord consist of?

  • testicular artery
  • pampiniform plexus
  • cremaster muscle and fascia 
  • Autonomic nerves

11

What structure within the spermatic cord is a branch of the abdominal aorta

Testicular artery

12

What structure within the spermatic cord is a network of veins surrounding the testicular artery 

pampinform plexus

13

What layer of the spermatic cord is formed from muscle fiber extensions of the internal oblique muscle 

cremaster muscle and fascia 

14

What structure within the spermatic cord travels with plexus and connect to the testes

Autonomic nerves

15

What is the function of the testes

  1. Production of sperm
  2. Production and secretion of androgens (male sex hormones) 

16

Each testis is covered anteriorly by a serous membrane called:

tunica vaginalis

17

The tunica vaginalis has an outer ______ layer and an inner ____ layer

parietal; visceral 

18

The thick whitish fibrous capsule covering the testis is called:

tunica albuginea 

19

The tunica albuginea projects into the interior of the testis as the _________  ______ through which blood vessels, lymphatic vessels, and some nerves enter and leave the testis

mediastinum testis

20

The tunica albuginea projects internally into the testes to form _____

septa

21

How many lobules can septa subdivide into? 

about 250

22

Each lobule contains (one/two/three/four/five) convoluted ________ _______

four; seminiferous tubules 

23

What types of cells do seminiferous tubules contain?

  1. Sustentacular cells
  2. Spermatogonia

24

Name this seminiferous tubule cell:

nondividing support cells that assist with sperm development; connected to each other by tight junctions and form the blood-testis barrier

sustentacular cells

25

Name this seminiferous tubule cell:

a population of dividing germ cells that continuously produce sperm beginning at puberty

Spermatogonia

26

Spaces external to an in between seminiferous tubules is: 

interstitial space

27

What resides in interstitial space and what do they do?

Interstitial cells and they produce hormones called androgens

28

List the ducts of the male reproductive system

  1. Ductus deferens
  2. Ampulla
  3. Ejaculatory duct
  4. Urethra 
  5. Epididymis 
  6. Ducts within testes
    1. Rete testis
    2. Efferent ductules

29

Name this duct within testis:

meshwork of interconnected channels in the mediastinum

Rete testis

30

Name this duct within testis:

Receive sperm from seminiferous tubules 

Rete testis

31

Name this duct within testis:

Channels merge to form efferent ductules 

Rete testis

32

Name this duct within testis:

Number 12-15 

Efferent ductules 

33

Name this duct within testis:

has ciliated cells that propels sperm

efferent ductules

34

Name this duct within testis:

Connects rete testis to epididymis

Efferent ductules 

35

This structure us on the posterosuperior surface of the testes

epididymis

36

What are the three regions of the epididymis

head, body, tail

37

How long is the duct of the epididymis

4 to 5 meters long

38

What is the function of the duct of the epididymis?

transports the sperm

39

What is the function of the epididymis

Storage and maturation of sperm

40

Sperm leaves the epididymis and enters the:

ductus deferens

41

As the ductus deferens approaches the prostate glands, it enlarges to form the :

ampulla

42

immediately prior to ejaculation peristalsis moves sperm from tail of ______ to _______

epididymis; ampulla

43

The ampulla unites with the proximal portion of the seminal vesicle to form the:

ejaculatory duct

44

The ejaculatory duct is located:

within the prostate gland

45

The ejaculatory duct conducts sperm from the ductus deferens to the:

prostatic urethra

46

The ejaculatory duct mixes sperm with ______ ____ prior to ejaculation

seminal fluid

47

What are the three parts to the make urethra?

  1. prostatic urethra
  2. membranous urethra
  3. spongy urethra 

48

What three glands (accessory glands) secrete seminal fluids to mix wth sperm to create semen?

  1. Seminal vesicles 
  2. Prostate glands
  3. Bulbourethral glands

49

What is the purpose of seminal fluids mixing with sperm

to nourish the sperm and neutralize the acidity of the vagina 

50

Secrete a viscous whitish-yellow, alkaline seminal fluid

Seminal vesicles

51

What makes up the seminal fluid in the seminal vesicles? and why?

  • Fructose to nourish sperm
  • Prostaglandins to facilitate sperm entry into the uterus
  • Bicarbonate that buffers the fluid

52

What does the prostate gland do?

Produces substances that are secreted directly into the prostatic urethra 

53

What makes up prostatic secretion? and why?

  • citric acid for sperm nutrients
  • seminalplasmin (antibacterial)
  • Prostatic-specific antigen [PSA] which is an enzyme that helps liquify semen

54

Mucin is secreted from these glands and enters the spongy urethra at the base of the penis 

Bulbourethral glands

55

What gland does pre-ejaculation come from

bulbourethral glands 

56

What do mucin secretions (pre-ejaculate) do? 

neutralizes fluid in urethra & flushes urethra 

57

Seminal fluid from the three accessory glands combines with sperm from testes to make:

semen

58

How much semen in volume comes out when ejaculating and how many sperms are contained 

3-5 mL and 200-500 million sperm

59

The penis and the scrotum form:

external genitalia

60

Internally, the attached portion of the penis is the _______ forming both the ____ and the _____ of the penis

root; bulb; crura

61

The elongated portion of the penis is the:

shaft

62

The tip of the penis is the _____, which surrounds the ______ _______ _______.

glans; external urethral orifice 

63

Foreskin =

prepuce

64

The shaft of the penis is comprised of three parallel cylindrical erectile bodies:

  1. Corpora cavernosa
  2. Corpus spongiosum
  3. Distal end of corpus spongiosum within the glans