ANATOMY

Detailed explanation-1: -By the time the egg leaves the isthmus, the zygote, now called the blastoderm or embryo, comprises eight cells and after four hours in the uterus it has grown to 256 cells.

Detailed explanation-2: -The first stage of chick development is the creation of a single cell (that’s called the zygote) that’s formed by the union of the egg and sperm cells of the parents. This cell will divide itself over and over again as the egg is being formed inside the hens 107 degree body.

Detailed explanation-3: -The yolk has a small white spot on it called the egg cell or germinal disc. This is the part of the egg from which the baby chick develops. The yolk provides food for the baby chick while it is growing in the shell.

Detailed explanation-4: -Eggs have a rounded and a pointed end. The air sac is the space at the rounded end and has a function in respiration and pressure adjustments. The membrane is attached to the embryo and functions to remove soluble, insoluble and gaseous waste products. As the embryo develops, the sac increases in size.