Male Repro Flashcards

1
Q

function of the testes

A

spermatogenesis and hormone production

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

spermatogenesis

A

spermatozoa produced in seminiferous tubules of testes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

hormone production - testes

A

androgens (male sex hormones) produced in interstitial cells of the seminiferous tubules
- principal androgen = testosterone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what are testes

A

male gonads. repro cells formed in the testes, located outside of the body in the scrotum (need to be kept cooler than body temp to produce viable spermatozoa )

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

scrotum

A

cutaneous sac of skin outside of the body cavity which holds the testes in mammals - structure derived from skin and connective tissue from the abdominal wall to regulate temp

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

where do testes develop in utero?

A

inside abdominal cavity near the kidneys. they then move to the scrotum outside of the body cavity, need to pass through inguinal canal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

are all testes located outside of the body?

A

some mammals and most birds have their balls on the inside

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what are inguinal rings/canal

A

like some sort of spinchter, lil ring that closes around the testes - testes pulled through before birth or shortly after

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

gubernaculum

A

band of connective tissue that attaches testes to scrotum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

balls dont descend in farm animal - consequences?

A

production and economic effects

  • sterile
  • no value as a breeding animal
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

cremaster muscle

A

passes through inguinal ring and attaches to scrotum, adjusts position of testes relative to the body - ensures viability for spermatozoa

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

seminiferous tubules

A

sperm production takes place in these u-shaped tubes.

1-25B a day in these tubes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

testosterone production

A

in interstitial cells between semiferous tubules. responsible for male secondary sex characteristics/libido - enhanced muscle and bone development

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

testosterone implants

A

helps to increase gains, feed conversion, carcass weight/muscling
speeds bone development, decrease fat deposition

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

spermatic cord

A

suspends testis in scrotum, links them w the rest of the body, includes blood vessels and nerves etc - designed for heat control as well

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

seminiferous tubules structcture

A

coiled and tightly packed into oval shape of testis. long convoluted U. between the tubules are the interstitial cells which produce the hormones

17
Q

tunica albuginea

A

beneath the tunics, encloses the testis. connective tissue. that contains the seminiferous tubules. protects and supports soft contents of the testis

18
Q

epididymis - what

A

long tube that connects efferent ducts of the testis w the vas defrens, where spermatozoa are matured (10-15 days) before they can fertilize

19
Q

epididymis sections

A

head, body, tail

  • mature in head and body
  • capable of fert once in the tail
  • tail acts as storage site.
20
Q

epididymis location

A

scrotum (what a funny sounding word)

sperm needs to be transported to urethra to jizz

21
Q

ductus defines/vas deferens

A

tail of epidydimus to urethra

propels sperm using peristalsis to urethra

22
Q

sperm road trip

A

produced in seminiferous tubule -> rete testis -> efferent ducts -> epididymis -> Vas deferens -> urethra

23
Q

seminal fluid

A

manufactured by accessory glands (seminal vesicles, prostate gland, bulbourethral)
used to carry the sperm
alkaline to combat acidity

24
Q

seminal vesicles

A

enters urethra at same area as bad defines, adds fluid to semen

25
Q

prostate gland

A

surrounds urethra

26
Q

urethra

A

located ventrally in the penis, usually carries urine. pumps out semen. can’t actively piss while humming.

27
Q

penis!

A

breeding organ, made of muscle, erectile tissue, connective tissue. urethra runs down center

28
Q

3 parts of the penis

A

roots, body, glands

29
Q

penis roots

A

where it attaches to pelvis, has 2 bands of connective tissue.
muscles in the roots are trimmed during carcass dressing, dont eat the penis.

30
Q

masculinity in relation to beef grading

A

graders will examine carcass for pronounced masculinity, look for ischiocavernous muscles, crest or neck muscles (increases w age), dark coloured/lean meat.
- beef from animals a pronounced masculinity may not be as tender, juicy, flavourful.

31
Q

penis body

A

made of 2 bundles of tissue, firbrous tissue and blood-filled spaces.
non-erect - even blood flow into and out of tissue.
erect - inflow exceeds outflow.

32
Q

penis tip

A

has rich supply of sensory nerve endings, sensitive to physical stim.
many species differences

33
Q

retractor penis muscle

A

pulls penis beck to non-erect, s shape. bulls, rams, boars have more connective relative tissue than other species.
penis doesnt enlarge much w an erection

34
Q

bulbourethral glands

A

in boars, very large, related to boar taint, attracts sows/ stimulates them to mate.

35
Q

cryptorchids

A

in pigs called ridgelings, when movement of testes through inguinal canal is incomplete. infertile.