Session 20 - male repro

Question 1

define sexual repro

Answer 1

process where organisms produce offspring by means of germ cells

Question 2

what are gametes

Answer 2

germ cells

• sperm and secondary oocyte

Question 3

functions of

1. ​gonads
2. ducts
3. glands
4. supporting structures

Answer 3

1. produce gametes and hormones
2. store and transport gametes
3. produce substances that protect gametes and facilitate their movement
4. assist gamete delivery

Question 4

in a male, what are the…

• gonads
• duct systems
• accessory sex glands
• supporting structures

Answer 4

• testes
• epididymis, ejaculatory duct
• prostate gland
• scrotum and penis

Question 5

Question 6

scrotum

Answer 6

• outwards pouch supporting testes
• There are two sacs seperated by vertical septum
  
  • each sac has a single testis
    *

Question 7

dartos muscle

Answer 7

muscle in scrotum for exposreu to cold = scrotum becomes tight

Question 8

cremaster muscle

Answer 8

in scrotum when cold moves testes closer to body

Question 9

testes

Answer 9

• paired oval shaped glands
• 5cm long and 2.5cm diameter
• develop near kidney and descend in scrotum in foetal development

Question 10

cryptorchidism

Answer 10

failure of testes to descend

Question 11

Testes have seminiferous tubules..what cells are these composed of

Answer 11

• spermatogenic cells
  
  • ​sperm forming cells
• sertoli cells
  
  • ​nourish developing sperm
  • secrete fluid for the sperm to move along tubes
  • secrete inhibit = low FSH

Cells in between the seminiferous tubules are leydig cells

• secrete testosterone

Question 12

order of sperm development

Answer 12

• spermatogonia
• primary spermatocytes
• secondary spermatocytes
• spermatids
• sperm cells