Draw a diagram of the microscopic structure of human sperm. Label the following parts in it and write their functions.
(a) Acrosome
(b) Nucleus
(c) Middle piece
Microscopic structure of human sperm
Function of Acrosome -
It contains enzymes that help the sperm to enter and to fertilise the ovum.
Function of Nucleus -
It stores the genetic information. It carries 23 chromosomes, out of which one is sex chromosome (either X or Y). Thus, it is responsible for determining the sex of the individual.
Function of Middle piece -
The middle piece contains several mitochondria, which produce energy for the movement of the tail and motility of the sperm.
Describe the process of Parturition in humans.
Write the location and function of the sertoli cells in humans.
When and where do chorionic villi appear in humans? State their function.
Write the function of each one of the following:
(a) (Oviducal) Fimbriae
(b) Coleoptile
(c) Oxytocin