How many cells are in your body?
There is no real consensus on the number of cells in the human body. Estimates put the number between ten trillion and one hundred trillion. A trillion is a million million-it is a word that crops up when we talk about the size of our national debt! The number of cells depends on the size of the person: bigger person, more cells. Also the number of cells in our body keeps changing as old cells die and new ones form.
Cells are so small that most can only be seen through a microscope. Every cell is made from an already existing cell. Each cell in the body behaves like a little factory and has two major components;
- The cytoplasm
- The nucleus
The cytoplasm contains the structures that consume and transform energy and perform many of the cell’s specialized functions, including storing and transporting cellular materials, breaking down waste, and producing and processing proteins. The nucleus is the control center and contains the genetic information that allows cells to reproduce. The mitochondrion in the cell is the factory where food and oxygen combine to make energy. Human cells are other animal cells have a membrane that holds the contents together.
This membrane is thin, allowing nutrients to pass in and waste products to pass out,. Foot is the energy the cell needs. Each cell needs oxygen to burn the nutrients released from food.
The body has some cells that do not experience cell division. And red blood cells and outer skin cells have cytoplasm but do not have a nucleus.
In the cell, the process is called respiration. Oxygen breaks down the food into small pieces. The oxidizing of the food molecules is turned into carbon dioxide and water. Water makes up about two-thirds of the weight of the cell.