Chapter 27- reproductive system Flashcards
function of reproductive system
- Produce some reproductive hormones - Produce gametes
- Facilitate fertilization
- Provide nutrients and gestate fetus
- Provide nutrients for newborn
function of male reproductive system
- Produce & maintain gametes
- Transport gametes into female for fertilization
- Secrete sex hormones
suspended by spermatic cord within the scrotum.
- produce sperm
- produce male sexx hormones
testes
male sex hormones
androgens– testosterone
actions of testosterone
fetal developement:
- stimulate formation of reproductive organs
- stimulate descent of testis
puberty: - stim developemnt of secondary sex characteristics
- inc cellular metabolism
- inc production of RBC
- stimulate sexual activity
Pouch of skin inferior to perineum
- Each testis occupies a scrotal cavity
scrotum
parts of the scrotum
tunica vaginalis, dartos muscle, cremaster muscle
part of the scrotum that is Serous membrane surrounding each testis
tunica vaginalis
part of the scrotum– wrinking of the scrotum
dartos muscle
part of the scrotum– Elevation of testes closer to body and Keeps them at lower temperature
cremaster muscle
vessel that extends through the inguinal canal
spermatic cord
parts of the spermatic cord
- Ductus deferens
- Gentiofemoral nerve
- Differential artery
- Testicular artery
- Pampiniform veins
lobules– compartments that house…?
seminiferous tubules
lobules seperated from one another by
tunica albuginea
each lobules straightens into
straight tubule
straight tubules meet at a maze called
rete testis
found inbetween the tubules and produce testosterone
interstitual cells
The process where sperm cells are made which occurs in the seminiferous tubules
- Meiosis occurs midway throughout this process: Results in haploid sperm
spermatogenesis
Stimulated by FSH and testosterone. support the growth of sperm and maintain blood testes barrier. produce the hormone inhibin (represses FSH)
nurse cells
stages of spermatogenesis
- Spermatogonia
- Primary spermatocyte
- Secondary spermatocyte
- Spermatid
- Spermatozoa
structure of a sperm
head– acrosome
neck
middle piece
tail
part of the head of the perm. vesicular compartment containing enzymes to penetrate oocytes
acrosome
part of the structure of a sperm that contains many mitchondria
middle piece
structure of a sperm that is a flagella
tail
Lies on posterior boarder of testes
Has a Head, Body, tail
epididymis
function of the epididymis
- Spermatozoa go from testes directly to epididymis
- Recycles damaged spermatozoa
- Stores spermatozoa and matures them
Moves out of scrotum and around bladder posterior. Enlarges at the base. Merges with the seminal vesicles
ductus deferens
base of the ductus deferens
ampulla
where peristalsis may occur
base of vas deferns
where the vas deferens merges with seminal vessicle to form
ejactulatory duct
First of three glands that contribute to semen. Posterior to bladder. causes sperm to become mobile
seminal vesicles
Muscular, rounded organ, 4 cm diameter. Inferior to bladder .Surrounds urethra. Secretes Antibiotic and seminalplasmin
prostate gland
Found in the urogenital diaphragm. Secrete thick, alkaline mucus
bulbourethral