Human Reproduction - Male Flashcards
(19 cards)
Testes
-found in scrotom cuz temp is 35C which is optimum temp for meiosis
-exocrine func- produce sperm by mieosis
- endocrine func - produces testosterone
Epididymis
Sperm matures here
Sperm duct / vas deferens
Carrie’s sperm to the urethra by peristalsis during ejaculation
- vasectomy = cuts sperm duct
Associated glands
Seminal vesicle
Secretes seminal fluid , contains fructose that nourishes the sperm
Associated glands
Prostate gland
Produce seminal fluid with alkaline fluid which protects the sperm from acidic environment
Associated glands
Cowpers gland
Secretes fluid that lubricates the penis for sexual intercourse (copulation)
Functions of seminal fluid
Allows sperm to swim
Acts as a lubricant for penis
Protects sperm from acidic environment
Sperm
Produced by meiosis in the testes
Sperm producing cells are diploid
Acrosome
Contains enzymes that digest the membrane egg
Midpiece
Contains many mitochondria which supply energy for sperm to swim
- mitochondria inherited by mother
Androgens
Male hormones
FSH
LH
testosterone
FSH
(Follicle stimulating hormone)
Production of sperm
LH
(Luteinising hormone)
Production of testosterone
Testosterone
Causes secondary male characteristic
Production of sperm
FSH LH produced
By the pituitary gland
Secondary sexual characteristic
Features that distinguish males from females apart from the sex organs
Male secondary sexual characteristics
-growth of pubic underarm facial body hair
-widening of shoulders
- enlargement of the larynx
Male infertility
Cause - low sperm count caused by smoking
Corrective measures- stop smoking
/ivf
Infertility
Inability to produce offspring
