Cells
Cells
Definition
Cells are the tiny building blocks of all living things. Every plant, animal, and human body is made of cells.
Main Details
Cells are very small and can only be seen with a microscope.
Some living things have only one cell, while others have billions of cells.
The nucleus controls the activities of the cell.
The cell membrane controls what enters and leaves the cell.
Plant cells and animal cells are different.
Examples
Red blood cells
Nerve cells
Muscle cells
Plant leaf cells
Bacteria
Interesting Points
The human body has trillions of cells.
Cells can join together to form tissues and organs.
Different cells have different jobs.
Brain cells can last almost a lifetime.
Fun Fact
If the DNA inside one human cell was stretched out, it would be about 2 meters long.