Cell Structure and Function

Cell functions

• Respiration: Cells require and absorb Oxygen to produce heat and energy.
• Growth: Cells grow to maturity by manufacturing proteins. They may then divide or specialise. 
• Excretion: Waste products pass out through the cell membrane.
• Irritability: Cells can respond to a physical, chemical or thermal stimulus.

Human cell structure in detail

• Cell membrane: An outer coating which selectively transports substances into and out of the cell. 
• Nucleus: The control centre of the cell, regulating its general and specialist functions. 
• Ribosomes: Made of ribonucleic…