Living Processes of Multicellular Organisms (5)

Biology

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Cell organisation in humans (3)

In organisms, tissues can be classified into four different types which are epithelial tissue, muscle tissue, nerve tissue and connective tissue

Epithelial tissue (1)

Epithelial tissue covers the outer surface (skin) and hollow surfaces in the body (digestive tract and respiratory tract)

Epithelial tissue (2)

The epithelial tissue structure is adapted based on its function

Epithelial tissue (3)

The epithelial tissue on the skin protects against infections, injuries, chemicals and dehydration

Epithelial tissue (4)

Epithelial tissues that coat the trachea have projections like hair, known as cilia (singular: cilium)

Type of muscle tissue (1)

Smooth muscle (found in the digestive tract, blood vessel, urinary tract and reproductive tract)

Type of muscle tissue (2)

Skeletal muscle (found in legs and hands)

Type of muscle tissue (3)

Cardiac muscle (found in the heart wall)

Function of smooth muscle

Contraction and relaxation of smooth muscle enable involuntary activities such as peristalsis along the digestive tract

Function of skeletal muscle (1)

Skeletal muscle is involved in controlled movement

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