specialization and organization of cells
Muscles cells, which affect movement by shortening, are typically elongated and tapered at either end.
Epithelial cells (those that form the lining of the lung) are thin and flat, because they easily allow substances to pass through them easily.
Nerve cells have a cell body with an elongated axon or fibre that is surrounded by insulating cells. Its form is related to its function of carrying electrical signals long distances within the body to communicate information.
Bone cells secrete a matrix mineral in which they live to provide the body with a bony support.
Red blood cells are thin and disk-like, and extrude their nucleus which helps to maximize their capacity for carrying oxygen.
Red blood cells are good at picking up oxygen and carrying it to other cells
The specialized cells all contribute to the functioning of the organism
the organism can live in a variety of environments (land, water),can grow to a large size,and can obtain energy from a variety of food sources
Muscle tissue – moves body parts
Nerve tissue – carries signal between the brain and other parts of the body to co-ordinate activities
Connective tissue (bone) – provides physical protection and support for the body.
Epithelial tissue – is a very thin tissue that lines the intestine and the lungs
