Tusomesasa.

Describe the gestation period in human beings.(15marks)

Suggested resposponses

Gestation is the period between conception and birth; it takes 40 weeks or nine months;

Week, 1-3, zygote divides to form blastocyst; implantation takes place; three germ layers form, endoderm, mesoderm and ectoderm; nervous system starts to form;

Week, 4-7, development of circulating and digestive systems; further development of the nervous system,...