Differentiate Spermatogenesis and oogenesis.

Describe the structure of a sperm. (or) Describe the structure of human sperm with a neat labelled diagram.

Explain the process of fertilization in human beings.

Write a note a extra embryonic membranes.

Describe the structure of human ovary.

Explain the structure and function of mammary glands.

Describe the spermatogenesis with diagram.

Explain the process of oogenesis.

Write a note on embryonic membranes

Name the three primary germ layers of embryo. Also, mention any three organs or organ systems developing from each layer.

The zygote passes through several developmental stages till implantation. Describe each stage briefly

With a suitable diagram, describe the organisation of Mammary glands.

(a) Arrange the following hormones in sequence of their secretion in a pregnant woman.
(b) Mention their source and the function they perform: hCG; LH; FSH; Relaxin

(a) Name the hormones secreted and write their functions.
(i) By corpus luteum and placenta (any two)
(ii) During follicular phase and parturition.
(b) Name the stages in a human female where:
(i) Corpus luteum and placenta co-exist
(ii) Corpus luteum temporarily ceases to exist

(a) In which part of the fallopian tube does fertilization occur in humans? Describe the development of a fertilized ovum up to implantation. 
(b) How is polyspermy prevented in humans?