Question

Write only the name of different stages of human reproduction.

Answer 1

1. Gametogenesis:

It is the formation of haploid gametes called sperms and ova from diploid primary germ cells called gametogonia. This includes

(a) Spermatogenesis: Formation of haploid sperms in males.

(b) Oogenesis: Formation of haploid ova in females.

2. Insemination :

It is the release of seminal fluid of male in the vagina of the female.

3. Fertilization:

It is the fusion of haploid male and female gametes to form the diploid zygote.

4. Cleavage:

It is the mitotic division of zygote to form blastula.

5. Implantation:

It is the attachment of a blastocyst on the endometrium of the uterus.

6. Placentation:

It is the formation of a tissue called placenta between the fetus and mother for nutrition, respiration and excretion of the fetus.

7. Gastrulation:

It is the process by which blastocyst is changed into gastrula with three primary germ layers.

8. Organogenesis:

It is the formation of specific organ systems from three primary germ layers of the gastrula.

9. Parturition:

It is childbirth that makes the end of reproductive phase.