The human brain The central nervous system is composed of the brain and the spinal cord, the brain is a nerve block containing millions of the nerve cells (the neurons) and it is the...
The photosynthesis process The green plant makes its own food by the photosynthesis process in its green leaves as they contain the chloroplasts, The green plant is called a producer organism, and the plant...
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.
