Spermatogenesis, Oogenesis And Fertilisation

Question 1

What is spermatogenesis?

Answer 1

Process of the which sperm cell production occurs
Takes place in the semiferous tubules located in the testes

Question 2

What is spermiogenesis?

Answer 2

Process by which haploid round spermatids complete a series of events to become sperm cells with head, neck, middle piece and tail - into motile sperms

Question 3

What is the structure of spermatozoa and functions?

Answer 3

Head - acrosome - has a nucleus so contains DNA
Mid piece (body) - packed with mitochondria to fuel propelling actions
Tail - axial filament

Question 4

What is oogenesis?

Answer 4

Production or development of an ovum

Question 5

What is the process of fertilisation?

Answer 5

Sperm and egg unite in 1 Fallopian tube to form a zygote
Zygote travels down Fallopian tube where is becomes a morula
Once it reaches uterus it becomes a blastocyst
Blastocyst burrows into uterine lining - implantation

Question 6

What are the 3 processes undertaken to ensure implantation?

Answer 6

1 - blastocyst contacts the implantation site of endometrium
2 - trophoblast cells of the blastocyst attach to endometrial epithelium
3 - invasive trophoblast cells cross the endometrial epithelial membrane and then invade endometrial stroma