Page 1 - 2. Lesson notes-Development of embryo
P. 1
SAI International School
Subject – Biology, Class-VIII
Topic- Reproduction in animals
Sub topic- Development of embryo
Module -29
Lesson notes
Development of embryo
The zygote divides repeatedly in oviduct and forms a ball of cells is called embryo. The
cells are grouped in to different types of tissues.
This developing embryo reaches uterus and gets embedded in its wall by a structure
called placenta. The embryo receives nourishment from mother’s body through placenta
and develops into a complete baby.
The structure of embryo having all body parts or organs is called foetus.
Zygote Embryo Foetus
Has only one cell. Have many cells. Have many cells.
No tissue differentiation is Tissue differentiation is Tissue differentiation is
seen. seen. seen.
Organs are not formed. Organs are not formed. Organs are formed.
