GESTATION PERIOD

Biology

GESTATION PERIOD

What is Gestation Period?

  • The period between conception and birth is called gestation.
  • In humans gestation takes nine months (40 weeks).
  • The embryo differentiates into tissues and organs during this period.

Week 1 to 3:

  • Zygote divides to form blastocyst.
  • Implantation takes place.
  • The three germ layers form endoderm, mesoderm and ectoderm.
  • Nervous system starts to form.
See also  KINGDOM FUNGI

Week 4 to 7:

  • Development of circulating and digestive systems.
  • Further development of nervous system, formation of sensory organs,
  • All major internal organs are developed.
  • At week 5, heartbeat starts.

Week 8 to 24:

  • All organs well developed including sex organs.
  • Hair, finger and toe nails grow.
  • Foetus move and eyelids open.
See also  PROCESS OR METHOD OF SCIENCE

Week 25- 30:

  The fully developed foetus responds to touch and noises and moves vigorously.

  The head turns and faces downwards ready for birth.

Week 31-40:

  • Foetus increases in size.
  • Birth occurs.

See also

FERTILIZATION IN ANIMALS

REPRODUCTION IN ANIMALS

METHODS OF FRUIT AND SEED DISPERSAL

POLLINATION

SEXUAL REPRODUCTION IN PLANTS

See also  GROWTH AND DEVELOPMENT

Leave a Reply

Your email address will not be published. Required fields are marked *