E5 Ch. 25 Flashcards Preview

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Flashcards in E5 Ch. 25 Deck (122)
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1

what are the primary sex organs

testes and ovaries

2

name the accessory sex organs

glands and external genitalia

3

where are the testes located

w/in the scrotum

4

what is the scrotum

skin and superficial fascia surrounding testes, positioning provides an environment 3 degrees cooler than body temp

5

what is the dartos muscle and function

layer of smooth muscle responsible for wrinkling scrotal skin

6

what is the cremaster muscle and function

band of skeletal muscle surrounding testes that elevates them

7

tunica vaginalis

serous sac enclosing testes

8

tunica albuginea

fibrous capsule of testes; divides each into 250-300 lobules

9

epididymis

comma-shaped structure on posterior testis

10

pampiniform plexus and function

where testicular veins arise from; helps keep testes cool

11

what part of the NS innervates the testes

parasympathetic and sympathetic divisions of the ANS

12

what separates the seminiferous tubules

separated by areolar CT

13

what are spermatogenic cells

sperm-forming cells

14

what are columnar sustentocytes

support cells

15

what do spermatogenic cells produce

sperm

16

about how much sperm is formed per day

~400 million

17

what part of life does sperm production being

at puberty; takes 75 days

18

what is the process of sperm formation

cells differentiate and move toward lumen
spermatogonia (stem cells)- secondary spermatocytes- spermatids-sperm

19

what do sustentocytes do

surround spermatogenic cells, assist sperm production, and secrete testicular fluid and androgen-binding protein

20

what are myoid cells

surround seminiferous tubules and contract rhythmically

21

what do interstitial endocrine cells secrete in males and what is it regulated by

testosterone; secretion regulated by LH

22

when uncoiled how long is the duct of the epididymis

6 m long

23

what type of tissue line s the epididymis

dominated by pseudostratified columnar epithelium, bears tufts of sterocilia- immotile, long microvilli

24

where do sperm gain the ability to swim and fertilize an egg though

though the acrosomal reaction

25

function of the ductus deferens

stores and transports sperm

26

describe the histology of the ductus deferens

epithelium= pseudostratified columnar, thick muscularis, and adventitia

27

list the structures found in the spermatic cord

ductus deferens, testicular blood vessels, and nerves

28

where does the superior portion of ductus deferens run though

inguinal canal

29

list the parts of the male urethra

prostatic, imtermediate (membranous), and spongy urethra

30

where are the seminal glands located

lie on posterior surface of the urinary bladder