Urinary system chp 32 Flashcards Preview

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Flashcards in Urinary system chp 32 Deck (35):
1

Urinary system

responsible for production and elimination of urine

2

What are 4 organs of urinary system?

Kidney (production of urine)
Ureter (tube from kidney to bladder)
Bladder (store urine)
Urethra (tube from bladder to outside of body)

3

Kidney

right and left, bean-shaped, post abd cavity on either side of vertebral column
Right lower d/t mass of liver above it
Lateral border is convex
Medial border is concave
Upper end = superior pole (adrenal gland)
Lower end = inferior pole
Cortex = periphery
Medulla = internal

4

Hilus

on concave medial border, where all structures entering/leaving kidney passes
marks entrance into cavity = renal sinus

5

Ureter

2 muscular tubes, takes urine from renal pelvis to urinary bladder, 25 cm long, descend along post abd wall, cross bifurcation of common iliac artery, turn medially towards bladder
courses thru muscular wall of bladder and opens into cavity

6

Urinary Bladder

musculomembranous sac that acts as reservoir for urine - in pelvis, resting on pubis

7

2 parts of muscular wall of bladder

trigone - btw 2 openings of ureter and internal urethral orifice
detrusor - remainder of bladder

8

Urethra

fibromuscular tube, drains urinary bladder, extends from internal urethral orifice to outside body

9

Flow of sperm

Testes (scrotum), Epididymis, Ductus deferens, Ejaculatory duct, Prostate gland, Urethra, Penis

10

Testes (2) / Testis (1)

Male gonad, contains many seminiferous tubules (fxn in production of male sex cell = sperm/spermatozoa, and hormone testosterone)
external to abd cavity in scrotum (skin pouch)
sperm leave seminiferous tubules via efferent ducts and pass to epididymis

11

Spermatogenesis

production of sperm - occurs at slightly less than body temp, hence location external to abd cavity

12

Epididymis

C-shaped structure located on the post surface of each testis, receives sperm from testis and stores it until ejaculation

13

Ductus Deferens (Vas deferens)

begins at epididymis, lengthy course w in spermatic cord, thru inguinal canal, along sup bladder, and inf along post bladder
join duct of seminal vesicle forming ejaculatory duct (terminates here)

14

Spermatic Cord

formed collectively by ductus deferens, and associated arteries and veins
asc thru scrotum to inguinal ring

15

Inguinal Canal

opening in external oblique muscle where spermatic cord passes

16

Seminal Vesicles

exocrine, on post bladder
produce seminal fluid added to sperm
1 of 3 accessory glands that produce fluid
drained by duct of seminal vesicle

17

Ejaculatory Duct

formed by union of ductus deferens and duct of seminal vesicle, union occurs post to bladder, above prostate, enters substance of prostate gland

18

Prostate Gland

2nd accessory gland, secretes seminal fluid, adds to what is produced by seminal vesicles
located in pelvis post to pubis, below bladder
Within substance here, 2 ejaculatory ducts join w duct draining bladder to form urethra

19

Urethra

fibromuscular tube, from prostate thru urogenital diaphragm (skeletal muscle btw rt/left ischiopubic rami) then thru penis to outside of body

20

What 2 things does the Urethra "carry"

Urine during urination and sperm during ejaculation

21

3 subdivisions of urethra:

Prostatic urethra - traverses prostate
Membranous urethra - traverses urogenital diaphragm
Spongy urethra - traverses penis

22

Bulbourethral Glands

2, small, exocrine, on either side of midline within substance of urogenital diaphragm
3rd accessory gland
ducts draining this empty additional seminal fluid directly thru spongy urethra

23

Penis

male external genital organ involved in sexual intercourse, urethra passes thru it
3 longitudinal connective tissues, filled w blood spaces = venous sinuses - fill w blood resulting in erection

24

Corpora Cavernosa

2 of them, venous sinuses only

25

Corpus Spongiosum

venous sinuses and spongy urethra

26

Course of Ova:

Ovaries, Uterine tubes, Uterus

27

Ovary

female gonad, contains many follicles = produce female sex cell (Ovum), and hormones Estrogen and Progesterone

28

Uterine tube (Fallopian tube or Oviduct)

2, from fimbriae in ovary, to uterus (tube attaches to lateral wall)
Conveys released ovum from ovary toward uterus

29

Fertilization

occurs in uterine tube, if no fertilization occurs, ovum degenerates in tube

30

Uterus

organ w extremely thick muscular wall, expands w developing fetus, in pelvis on sup bladder
Fundus - above opening of uterine tubes
Body - main mass, extends post to constriction called isthmus
Isthmus - constricted part btw body and cervix
Cervix - opens into vagina, palpated thru vagina

31

Vagina

canal extending from cervix of uterus inf to vestibule of vagina
ant to rectum, post to urinary bladder
separate and distinct canal from urethra
involved in sexual intercourse

32

Hymen

membranous fold that causes partial closure in vestibule of vagina

33

Greater Vestibular Glands

2, small, ovoid, on lateral wall of vagina, just inside vestibule, ducts draining these open into vestibule, compressed during intercourse secreting lubricant mucous

34

Labia Minora

2 small folds of skin (inner) on either side of vestibule, usually hidden by labia majora

35

Labia Majora

2 elongated folds of skin, extends post from pubis, outer surface covered w coarse hair, inner surface is smooth