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Unit 3 Lesson 12 Vocabulary
Unit 3 Lesson 13 Vocabulary
Male Anatomy
Female Anatomy
Sexually Transmitted Diseases
Disease Causing Pathogens
Bacterial and Animal STD Infections
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Male Anatomy
Male Reproductive System
Internal Organs
Testes
Two male gonads inside the scrotum that has two functions:
Produce sperm and produce testosterone
Testes develop during 7th to 8th week of embryonic development.
During the 8th and 9th month the testes move downward from the pelvic cavity to the scrotum through he inguinal canal.
Testosterone
Male hormone that causes secondary sex characteristics.
Seminiferous Tubules
Coiled network of tubes that fill each testes.
800 feet of tubes.
Sperm
Male sex cell
Mature sperm-14 years
Hereditary material located in the head of the sperm
.0024 inch long
Head, neck, midpiece, and tail
Tail propels the sperm
23 chromosomes
X or Y chromosome
Epididymis
Storage structure for sperm found on the upper surface of testes.
Sperm mature in the epididymis for 2 to 6 weeks.
Vas deferens
Long, thin cords from each testes that extend from the epididymis to the seminal vesicle
Seminal Vesicle
Small glands at the end of the vas deferens that secretes an alkaline fluid rich in sugar.
This fluid also provides energy for the sperm to keep them alive.
Prostate Gland
Secretes a milky fluid that has an alkaline pH to neutralize the seminal fluid.
Cowper’s gland
Two glands located on each side of the urethra secreting a mucus-like lubricating fluid.
This fluid provides lubrication to the end of the penis and the urethra for intercourse.
Precoital fluid, alkaline reduces acidity in urethra, contains sperm.
Urethra
Passageway from bladder to outside tip of the penis, urine and sperm passageway
Penis
Male organ of sexual pleasure, reproduction and urination.
Delivers sperm to the vagina during sexual intercourse.
Nocturnal Emission
“Wet dream”
a spontaneous ejaculation that occurs during sleep.
Occur due to changes in hormonal concentrations or as a result of erotic dreams.
Masturbation
Physical stimulation of the genitals.
Circumcision
Surgical removal of the foreskin from the head of the penis.
Pathway of the Sperm for ejaculation:
Sperm is produced in the seminferous tubules of the testes and are stored in the epididymis.
From the epididymis the sperm travel along the vas deferens, a tube covered with smooth muscle which contracts to move the sperm.
Sperm then pass through the seminal vesicle and prostate glands where fluids are added.
Eventually this mixture reaches the urethra, passing through the Cowper’s gland where more fluids are added.
The sperm and the fluids together known as sperm are ejaculated out of the penis as semen.
Sources and Function of Seminal Fluid or Semen
Seminal fluid or semen is make up of fluids secreted by the prostate, seminal vesicle and Cowper’s gland.
It has a basic pH which promotes sperm survival, it contains fructose to nourish the sperm.
It contains prostaglandins which causes the uterus to contract moving the sperm to it’s upper regions.
These contractions move the sperm to the fallopian tubes within minutes of ejaculation.
Once out of the body the sperm have a life span of about 48 to 72 hours.
(ability to fertilize)
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