Reproduction

Question 1

What is spermatogenesis?

Answer 1

Is the process by which haploid spermatozoa develop from germ cells in the seminiferous tubules of the testis.
Sperm are produced within the walls of the seminiferous tubules
Within these tubules there are SERTOLI CELLS that nourish and support the immature sperm
The SERTOLI CELLS then transfer the sperm from the semiferous tubule into the central channel.

Question 2

What happens in phase 1 of the human sexual response?

Answer 2

EXCITEMENT 
muscle tension increase 
Heart rate quickens 
Skin becomes flushed 
Nipples become erect 
Blood flow to the genitals increase 
Vaginal lubrication begins 
Breasts become bigger and vaginal walls swell
Testicles swell
Scrotum tightens

Question 3

What happens in phase 2 of the human sexual response?

Answer 3

PLATEAU
Vagina continues to swell
The vagina walls turn dark purple
The clitoris becomes highly sensitive to touch and retracts under the clitoral good to avoid direct stimulation with the penis
The testicles are withdrawn up into the scrotum

Question 4

What happens in phase 3 of the human sexual response?

Answer 4

ORGASM
Involuntary muscle contractions begin
Blood pressure and heart rate are that their highest with a rapid intake of oxygen
There is a sudden and forceful release of sexual tension
Muscles in the vagina contract
The uterus undergoes rhythmic contractions
Rhythmic contractions at the base of the penis result in ejaculation

Question 5

What happens in phase 4 of human sexual response?

Answer 5

RESOLUTION
body returns to its starting state
Often feeling fatigue
Men sometimes need a refractory period