Male Reproductive Tract Flashcards Preview

CTC Junior Vet science > Male Reproductive Tract > Flashcards

Flashcards in Male Reproductive Tract Deck (48):
1

Testicles

Produce sperm cells that fertilize the female's egg
Lie externally to the abdomen

2

Testosterone

Hormone that makes the appearance and behavior of a male masculine and testosterone

3

Epididymis

Where sperm are stored from the testicle to mature

4

Scrotum

A sac that contains and protects the testicles, regulated the temperature
Can retreat towards the body when warmth is needed and can descend when cooling is needed

5

Vas Deferens

Transports sperm from the epididymis to the urethra

6

Urethra

Large muscular canal extending from the urinary bladder. Through this urine and semen are excreted

7

Accessory Sex Glands

Seminal vesicles, prostrate, and bulbouerthral gland
Primarily add to the sperm fluid to provide health and nutrition to sperm

8

Penis

Organ of copulation. Characterized by spongy, erectile tissue. Provides passageway for semen and urine

9

Seminiferous tubes

Found inside the testes and the site of sperm production

10

The vas deferens takes the sperm where?

To the prostate gland where accessory secretions are added to the sperm

11

Sperm cells contain

Flagella for movement
Mitochondria for energy
DNA for fertilization

12

Pituitary gland helps to control function of

Testes

13

Luteinizing Hormone (in males)

Stimulates the production of testosterone

14

Follicle Stimulating Hormone (in males)

Facilitates sperm production

15

Fibroelastic Penis

Uses sigmoid flexure and retractor muscle to become erect

16

Vascular Penis

Will fill up with blood to become erect (humans and horses)

17

Thermoregulation

Regulation of temperature of testes to support fertile sperm production

18

Cryptochidism

When one or neither testes descend into the scrotum during fetal stages

19

Convoluted

Contains many veins

20

Vasectomy

Procedure to sterilize a male

21

Spermatogenesis

Formation and growth of sperm

22

Testosterone
Origin and function

Origin: Leydig cells found in the testes
Promotes: spermatogenesis and secondary sex characteristics

23

Tunica Dartos Muscle
Origin and function

Origin: Scrotum
Functions: Suspend testes in scrotum and provide heat/cooling system

24

The 3 Parts of the Spermatic Cord

1. Ductus Deferens
2. Pampiniform Plexus
3. Cremaster Muscle

25

Ductus(/Vas) Deferens Function

Move fertile sperm from the tail of the epididymis to penis

26

Pampiniform Plexus Function

Composed of testicular artery and veins to cool blood before scrotum

27

Cremaster Muscle

Supports testes, pull up testes during fight/flight (short period of time)

28

Gubernaculum Function

Pulls testes through inguinal ring into the scrotum

29

Inguinal ring

Opening between the body and scrotum

30

Unlilateral Cryptorchidism

Only 1 testis descends into the scrotum

31

Bilateral Cryptorchidism

Both testes don't descend into the scrotum

32

3 functions of the Epididymis

Sperm transport
Sperm maturation
Sperm storage

33

Head of Epididymis (caput)
State of sperm

Entry point of Epididymis for sperm
sperm are not motile or fertile

34

Body of the epididymis (corpus)
State of sperm

Maturation occurs here
Sperm some what motile and fertile

35

Tail of the Epididymis (cavada)
State of sperm

Sperm is stored here (5-10 ejaculations)
sperm are motile and fertile
sperm can bind to an egg

36

The 2 parts of the fibroelastic penis

Sigmoid flexure
retractor penis muscle

37

Sigmoid flexure

'S' shaped curve that holds the penis within the body when not erected or helps with erection

38

3 Sterilization Techniques

Castration
Vasectomy
Shortening of the spermatic cord

39

Castration

Removal of the testicles, no sexual acts

40

Vasectomy

Cutting to sever the Ductus Deferens

41

Shortening of the spermatic cord effect

Raises the testicles closer to the body - makes the sperm too close to the body and too hot - making them infertile

42

Thermoregulation is important because

Sperm will die if too hot, too cold, or comes into contact with blood

43

Thermoreceptor function

Sends messages to the brain if too hot/cold

44

Sweat gland function in male reproduction

located on the scrotum and will allow for cooling

45

Tunica Dartos Muscle function

Expand when too hot (testes away from body)
Pull up when too cold (testes to the body)

46

Leydig cell
Function and location

Function : produce testosterone
Location : outside the seminiferous tubules

47

Sertoil cell
Function and location

Function : Protect and aid in growing sperm
Location : Inside seminiferous tubules

48

Steps of sperm transport

1 - Seminiferous tubules
2 - Epididymis
3 - Vas deferens
4 - Penis
5 - Into female tract