Some people say that an egg is a cell! Do you agree with this statement? State your reasons. Observe the structure of the egg and draw the structure diagram of the egg.

Wrong, the membrane in the eggshell is not cell membrane, and protein is not cytoplasm. Cell membrane is yolk membrane.

Eggs can't be said to be cells, because they are eggshell, outer shell membrane, inner shell membrane, egg (egg) white and egg (egg) yellow from outside to inside, and there is an air chamber between the outer shell membrane and the inner shell membrane. Egg white is a nutrient for the development of chicken embryos.

Egg yolk and yolk membrane are egg cells formed by ovaries, and egg whites and eggshells are formed by fallopian tubes, not counting.

If there is no fertilization before delivery, the yolk is an egg cell. If the fertilized egg is produced, the egg is fertilized in the hen, and the embryo development begins in the hen, so we should have seen the embryo. It is not accurate to say that eggs are cells, but it is correct to say that eggs have only one cell, that is, the yolk. If it is unfertilized, it is an egg cell. If fertilized, it is a fertilized egg cell. Egg white is only a nutrient provided for the incubation process, which is the origin of the name protein.

This is just for the newborn eggs. If the egg begins to hatch and the fertilized egg needs to divide, more than one cell will appear. ? The shell of an egg is a calcareous hard shell called an eggshell. Eggshell plays a protective role. There are about 7000 holes in the eggshell, which can be ventilated. There are two layers of egg membranes near the eggshell, and the outer layer is thicker. At the blunt end (big head) of an egg, a small air chamber is often formed between the two membranes to store the air used for breathing during embryo development. This is the empty part of the boiled egg. Inside the egg membrane is a large amount of egg white (egg white), which consists of water, protein, a small amount of sugar and inorganic salts; The outer layer is thin, which can be called dilute protein, and the inner layer is thick, which can be called crude protein. These substances are nutrients for the development of chicken embryos. Inside is spherical yolk (yolk), which is an egg cell. There is a thin film on the surface of egg yolk, called yolk membrane, which is the cell membrane. Egg yolk is generally layered, consisting of yellow yolk and white yolk alternately arranged in concentric circles, with the yolk center in the middle, the yolk center neck connected with the blastoderm, and thick protein at both ends of the yolk along the long axis of the egg, which keeps the egg in the protein center, plays a buffering role, prevents the egg from shaking, and is beneficial to the hatching of the egg. There is a small white plate on the yolk (that is, a small white spot seen on the yolk), which consists of a nucleus and a part of cytoplasm. This is the blastoderm. If it is a fertilized egg, the blastoderm can hatch chickens under suitable conditions.