The organisation of cells

There are 4 main tissue types in the human body:

• Epithelial tissue
• Connective tissue
• Muscle tissue
• Nervous tissue

There are 6 main types of epithelial cells which are:

• Simple squamous - commonly found lining the surfaces of blood vessels, the alveoli and forms the walls of capillaries
• Cuboidal - Line many tubes in the body
• Columnar - Line many tubes in the body
• Ciliated - often contain goblet cells that produce mucus, form the surface of the tube of the lungs and oviducts
• Glandular - Made up of goblet cells that secrete mucus
• Compound - Found where the surface is continually scratched and abraded such as the skin