The human nervous system The nervous system is a communication and controlling body system, It consists of the brain, the spinal cord and the nerves, and it is the most important system inside your...
unicellular organisms The unicellular organism is an integrated living organism that proves that the cell is the unit of structure and function because it has the ability to do all its biological functions.
Electricity dangers The human is a good conductor of the electricity as 70 % of the body contains the water, the human is more exposed to the electric shock when it is wet and it...
The animal tissue is composed of small units called animal cells, where each cell contains many components, The animal cells are of various sizes and have irregular shapes, and most of the cell size...
