Question

(a) Explain the terms: (i) implantation (ii) Placenta (b) What is the average duration of human pregnancy?

Answer 1

(1) Implantation : It is the process of after fertilization the attachment of the ovum to the endometrium.

(11) Placenta : Placenta is the connection between mother and embryo. Placenta play the role of respiration, nourishment and excretion of the embryo.

(b) average duration of human pregnancy is 40 weeks.

Answer 2

Answer:

1. Implantation - It is the process of attachment of blastocyst (mass formed by division of zygote) with the uterine wall. It takes places about a week after fertilization. ... The average duration of of human pregnancy in human females or gestation period in human females is 280 days or 40 weeks. (plz plz mark me Brainliest)