Reproductive System Flashcards
genetic material of coiled up masses of DNA in the nuclei
chromosomes
chromosomes are
always even and always in pairs
Female chromosomes
XX
male chromosomes
XY
male gonads
testes
long thin cells with head midpiece and tail
sperm
band of connective tissue that attaches testes to scrotum
gubernaculum
houses testes and regulates their temperature
scrotum
spermatic cords
pampiniform plexus
2 layers of connective tissue that surround testes and spermatic cord
tunics
beneath tunics fibrous connective tissue capsule
tunica albuginea
divide testes into 2 lobules
septa
spermatogenesis takes place in U shaped tube
seminiferous tubules
support developing sperms and shield from body’s immune system
sertoli cells
flat ribbon like structure that lies along surface of tested used for storage for sperm and maturity
epididymis
moves sperm from epididymis up to urethra when ejaculation occurs
Vas Deferens
sperm and secretions from glands
semen
male breeding organ
penis
what is the penis made up of
muscle, erectile tissue, connective tissue, blood, and nerves
2 bands attach penis to pelvis
roots
2 bundles of erectile tissue
body
distal end of the penis
glans
sheath of skin that encloses the penis
prepuce
S shape that straightens when penis is erect
sigmoid flexure
what pulls penis back after ejaculation
retractor penis muscle
functions of female repro system
sex hormones, develops gametes, receives male gametes, fertilization, grow and develop embryo
supports ovaries
mesovarium
supports oviducts
mesosalpinx
supports uterus
mesometrium
female gonads that produce gametes and hormones
ovaries
produce one ovum per cycle (horses, cattle, humans)
uniparous
produce multiple ova per cycle (dogs, cats, sows)
multiparous
formed from cells lining corpus hemorrhagicum and produces progestins to maintain pregnancy
corpus luteum
funnel like portion of fallopian tube closest to ovaries
infundibulum
finger-like structures that reach out to the ovary
fimbriae
hollow, muscular organ that holds embryo and creates placenta
uterus
parts of uterus
horns, body, cervix
layers of the uterus
endometrium, myometrium, perimetrium
smooth muscle sphincter connected to uterus
cervix
muscular tube that receives penis, birth canal
vagina
outer portion of female repro system
vulva, labia, clitoris
heat period
estrous cycle
estrous cycles throughout the year (cattle, pigs, mice)
polyestrous
multiple estrous cycles in seasonally times of the year (horses, sheep, goats)
seasonally polyestrous
one estrous cycle per year (dogs, wolves, foxes)
monoestrous
period between cycles
diestrous
provides oxygen and nutrients to a baby en utero
placenta
tube that provides nutrients to embryo
umbilical cord
proestrus
follicle and endometrium development, thickening of the oviduct, uterus, and vagina, vagina lines itself with keratin to protect during breeding
estrus
“heat” period, pheromones are released to attract male for breeding
metestrus
third stage in cycle, sexual inactivity, formation of corpus luteum, progesterone is released and uterine wall becomes thick for implantation
diestrus
last stage before next cycle, fully functional corpus luteum and increase of progesterone
anestrus
period of sexual rest