(a) Where do the signals for parturition originate from in humans?

Given reasons for the following: 

(a) The human testes are located outside the abdominal cavity.

(b) Some organisms like honey-bees are called parthenogenetic animals.

The following is the illustration of the sequence of ovarian events “a†to “i†in a human female:

(a) Identify the figure that illustrates corpus luteum and name the pituitary hormone that influences its formation.

(b) Specify the endocrine function of corpus luteum. How dies it influence the uterus? Why is it essential?

(c) What is the difference between d and e?

(d) Draw a neat labeled sketch of Graafian follicle. 

(a) Explain the menstrual phase in a human female. State the levels of ovarian and pituitary hormones during this phase.
(b) Why is follicular phase in the menstrual cycle also referred as a proliferative phase ? Explain.
(c) Explain the events that occur in a Graafian follicle at the time of ovulation and thereafter.
(d) Draw a graafian follicle and label antrum and secondary oocyte

Why is breast-feeding recommended during the initial period od an infant's growth? Give reasons. 

(a) Briefly explain the events of fertilisation and implantation in an adult human female.

(b) Comment on the role of placenta as an endocrine gland.

Name the embryonic stage that gets implanted in the uterine wall of a human female. 

State the importance of biofortification. 

Draw a labelled diagram of the reproductive system in a human female.

130.

Draw a labelled diagrammatic sectional view of a human seminiferous tubule.