Human Reproduction Flashcards
Reproductive events ??
Gametogenesis
Insemination
Fertilization
Implantation
Gestation
Parturition
Where is the male reproductive system is located ?
Pelvis region
Scrotum ?
It is pouch
Helps in lowering the temperature by 2-2.5 celcius
Nessecary for spermatogenesis
Testis shape and size
Oval
L= 4 to 5cm
W= 2 to 3 cm
Compartment of testis and how many ?
Testicular lobule
250
Seminiferous tubules and lined by which cells ?
One lobule contain three highly coil seminiferous tubules
Lined by 2 types of cells called
GERM CELLS (spermatogonia)
-this goes under meiosis and forms sperms
SERTOLI CELLS
-provide nutrition to get cells
Seminiferous tubules के बहार का मामला?
Interstitial space contains blood vessel and Leydig cells
these cells secrete Androgen
male accesory ducts ?
rete testis, vasa efferentia epididymis, vas deferens
male system testis?
seminiferroes tubules opened to vasa effrentia through retetestis
vasa efferentia to epididymis along the posterior surface of each testis
epidymis to vas deference that Ascend to the abdomen and loops over the urinary bladder
received duct from seminal vesicleand open into urethra as ejaculatory duct
urethra originates from the urinary bladder and extends through the penis to its external opening called urethral meatus
male accessory glands ?
Paired seminal vesical
1 prostate gland
2 bulbourethral gland-lubed
The female reproductive parts
?
2 ovaries —primary sex organ
2 oviducts
Uterus
Cervix
Vagina
External genitalia
Mammary gland
Ovary ?location and size ?
Lower abdomen
2 to 4 cm
And connected to pelvic wall and uterus by ligaments
Ovary covered by thin epithelium
Which enclose ovarian stroma
Stroma into two
Peripheral cortex
Inner medulla
Female accessory ducts
Fallopian tube ( oviduct )
Uterus
Vagina
Fallopian tube length
10 12 cm
Part closer to ovary ? And parts of oviduct
Infundibulum
And edges of infundibulum posses finger like projections called fimbriae help in collection ovum
Ampulla
Wider part
Isthmus
Narrow lumen and joins to uterus
Uterus ?
Womb
Shape -inverted pear
Supported by ligaments attached to the pelvic wall
Walls of uterus
Perimetrium – thin external
Myometrium – middle thick smooth muscle
Strong contraction during delivery
Endometrium– inner glandular
Cyclic changes during menstrual cycle
Female external genitalia?
Mons pubis - cusion of fatty tissue
Labia majora - fleshy fold tissue, surround the vagina,extend from Mons pubis
Labia minors - pair fold of tissue under labia majora
Hymen - opening of vagina partially covered by this
Clitoris - tiny finger like structure
Mammary gland?
Breasts that contain glandular tissue and variable amount of fats
15-20 mammary lobes
Mammary alveoli
Mammary tubule
Mammary duct
Mammary ampulla
Lactiferous ducts
Nipples
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Immature male germ cells produce sperms by ? And at which age
Spermatogenesis
Puberty
Spermatogonia location
And divides by which process?
Inside wall of seminiferous tubules
Mitotic division
Spermatids to spermatozoa( sperm)
Process called?
Spermiogenesis
Sperms release from seminiferous tubules by the process called ?
Spermiation
Spermatogenesis starts by which hormone
Gnrh
Hypothalmic hormone
Act on anterior pituitary
Functions of LH and FSH
LH act on leydigcells and stimulate synthesis and secretion of androgens
FSH act on Sertoli cells and stimulate secretion of some factors helps in spermiogenesis
Sperm ?
Head - contains haploid nucleus
Anterior portion covered by cap like structure called acrosome
It is filled with enzymes
Neck
Middle piece - contains mitochondria.produce energy for motility
Tail
Plasma membrane envelope hole body
