Module 16 - Male Reproductive System Flashcards
What muscles attach on the bottom portion of each testes
Dartos muscles (smooth muscle)
What muscles surrounds the spermatic cords and pulls testes closer to body?
cremaster muscle
Each testes tubules contain smaller tubules called ________.
seminiferous tubules
each tubule is lined with special celled known as _______ epithelium
germinal
germinal cells give rise to
sperm cells
special cells in the seminiferous tubules are called
sustentacular cells
sustentacular cells ______ & _____ germinal cells
protect & support
Hollow space running through center of each tubule is called
lumen
spermatogenesis
germinal cells develop into sperm cells
germ cells under go what type of cell division
meiosis
All seminiferous tubules merge to form
rete testis
Sperm cells partially mature in a ____ _____ before moving out of testis into a spermatic duct called the _______.
rete testis
epididymis
interstitial cells, found between seminiferous tubules are the primary source of _______
testosterone
how many days does it take sperm to travel through the epididymis to the distal end for storage?
20 days
The ductus deferens carries sperm to unite with a duct from the ____ _____
seminal vesicle
What is the duct called at the point where the ductus deferens and seminal vesicles merge?
ejaculatory duct
ejaculatory duct carries sperm through the ___ ____ into the urethra
prostate gland
during fetal development _____ germ cells (2n) develop to become spermatogonia & remain dormant until puberty
primordial
sperm cells mature in a process known as
spermiogenesis
during development spermatids grow ______.
flagella
The head of sperm contains a ______ nucleus & a cap digestive enzyme known as _____.
haploid; acrosome
The enzymes in a acrosome help penetrate the outer portion of a _____ _____ during fertilization
secondary oocyte
The midpiece of a sperm cells contains _______ to provide energy (ATP) required for sperm to move
mitochondria
the tail end called _______ uses ATP from midpiece to propel sperm
flagellum
seminal fluid contains what?
fructose
citrate (alkaline)
prostaglandins (stimulates smooth muscle in uterus)
What does semen contain
60% seminal fluid
30% prostate fluid
10% bulbourethral fluid (lubricates)
______ fluid elevates pH and help sperm survive
prostate
