Hydrogen is present in our body about 9.5 percent while oxygen is present in large amount about 65 percent of the total human body. Oxygen mostly present with hydrogen in the form of water. About 70 percent of our body is composed of water. Water is present in every cell. Some oxygen is also present in gaseous form in the cell. This oxygen comes in the body through breathing.
Despite the differences in mature plant cells, all of them are derived from meristem cells. the three major types of tissue systems develop from the meristem. meristems develop cells in all but which tissue?