The process of Gastrolation, in which the cells form three layers: The lower layer becomes the lungs, liver and digestive tract, the middle layer turns into the heart, muscles, bones and blood, while the top layers develops into the nervous system, skin and hair.
The narrator says that “cells talk to each other.” What does that mean?
It means that cell communicate with each other by chemical messages with the "intention" of organizing themselves.
How do cells in different parts of the embryo become different kinds of cells and organs?
It depends on the genes. There are specific parts of the genes that activate. This parts make a cell differ from another. The process of differentiation is also related to Gastrolations, which was explained previously.
What kinds of proteins are found in different cells and organs?
It depends on the the function of each protein and organ/cell. For example, Hemoglobin is found in blood forming part of erythrocytes with the function of carrying oxygen to different organs and parts of the body. Collagen is found in different kinds of tissues and in some organs such as skin, tendons, bones and the cornea. Actin and myosin are found in muscles. Crystalline is found in the lens of the eyes.
What tells the cells which kinds of proteins to make?
What is the relationship between DNA, genes, and the proteins that are produced in cells?
The DNA is our genetic code. Some parts of the DNA (genes) are activated in different cells of our organism and after the process explained in the previous question, the genes determine specific proteins. Proteins are the most abundant organic macro molecule in our body.
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