Chapter 4 Male Reproductive System
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Chapter 4 Male Reproductive System
Male Reproductive System
Chapter 4 The Male Reproductive System
Pathway of sperm from the testis to the urethra in their proper order.
Seminiferous tubules -> epididymis -> vas deferens -> urethra
Male gonads; produces sperm and androgens. Located outside body in scrotum.
Highly coild tube adjacent to testis.
Site of testosterone production
The ___ conveys both sperm and urine down the length of the penis.
Organs (4) that contribute to the formation of semen are ____ ____ ____ and ____
testes, seminal vesicles, prostate gland, and bulbourethral glands
The ____ is an external skin sac that houses the testes
The ____ surrounds the urethra at the base of the bladder; produces a milky fluid
Organ that delivers semen to the female reproductive tract.
Tube that transports sperm during ejaculation from epididymis to urethra.
Three important glands of the male reproductive system are the ____ ____, ____ ____, ____ ____
Seminal vesicles, prostate gland, and bulbourethral glands
The ____ produces lubricating mucus that cleans the urethra.
The ____ are passageways from the epididymis to the ejaculatory duct + urethra
Secrete a thick, yellowish, alkaline fluid containing fructose, vesiculase (coagulationg enzyme) & prostaglandins.
____ conveys both sperm and urine down the length of the penis
Secretes a thin, milky fluid containing zinc and fibrinolysin (anticoagulating enzyme)
Secrete tiny amount of alkaline mucus into urethra just before ejaculation.
The scrotum is __ cooler than body temperature
~2 degrees (Celsius)
Copulatory organ of male, contains 3 columns of erectile tissue, delivers sperm into vagina
External sac enclosing the testes; ~ 2 degrees cooler than the body temperature
http://en.wikipedia.org/wiki/Scrotum says the units are Celsius
Development of sperm from germ cells (spermatogonia) by meiosis
What three things occur during the Prenatal period of a male's life?
1) PCGs migrate to genital ridges (week 3)2) PGCs proliferate and differentiate into spermatogonia (week 5,6, and 7)3) Spermatogonia become inactive
Spermatogonia remain inactive from ___ to ___
Postnatal -> Prepuberty
Spermatogenesis occures in seminiferous tubules of testes from ___ to ___
Puberty -> Death
Stage 1 of male reproduction process.
Proliferation & Regeneration
Spermatogonia (2n) proliferate & differentiate into 3 types: (meiosis) ____ ____ & _____
Type A Dark Type A Pale & Type B
(It was noted that the reverse pathway regenerates stem cells)
I figured this was Type B to Pale A to Dark A
____ are dormant (reserves).
Type A Dark
___ proliferate forming new Type A pale and Type B
Type A Pale
___ differentiate into primary spermatocytes (2n)
Stage 2 of male reproduction process.
The ____ spermatocyte divides by____ (the process) into two ____ spermatocytes
primary; Meiosis I; secondary
The ____ spermatocytes divide by ____ (the process) into four ____
secondary; Meiosis II; spermatids
Stage 3 of male reproduction process.
During Spermiogenesis ___ is transformed into ____
4 events that occur during the transformation of a spermatid into sperm are ____ ____ ____ & ____
nucleus condenses, acrosome forms, flagellum forms, cytoplasm reabsrobed by Sertoli cells
Where does sperm go once formed?
Lumen of seminiferous Tubule then epidydimis
3 parts for mature sperm are ____ ____ & ____
Head, Middlepiece, and tail
Two parts of the head of a sperm cell are ___ & ___
Acrosome and nucleus (n)
The middlepiece of a sperm cell contains the ____
___ is a functional motile gamete
___ are the products of meiosis II
Four spermatids (n)
___ are the products of meiosis I
Two secondary spermatocytes (n)
____ ____ and ____ all contain 23 chromosomes
Secondary spermatocytes, spermatids, and sperm.
____ are aka stem cells
____ and ____ are two hormones necessary for sperm production.
Testosterone and FSH (follicle stimulating hormone)
The ____ is theDNA- containing area of the sperm.
nucleus in the head of the sperm
The enzyme containing sac that aids in sperm penetration of the egg is the ____.
The part responsible for movement is the ____.
The metabolically active organelles that provide ATP to energize sperm movement is the ____.
Mitochondria in the neck region.