Forms external body covering and protects deeper tissue from injury e.g. hair, skin & nails.
Fast acting control system of the body, it responds to internal and external changes by activating appropriate muscles and glands. Brain, nerves & spinal cord.
Protects and supports body organs, and provides a framework the muscles use to cause movement. Blood cells are formed within bones.
Glands secrete hormones that regulate processes such as growth, reproduction, and nutrient use by body cells. Glands e.g. adrenal gland, pineal gland, ovary.
Allows manipulation of the environment, locomotion, and facial expression. Maintains posture & produces heat.
Blood vessels transport blood, which carries oxygen, carbon dioxide, nutrients, wastes, etc. The heart pumps blood.
Picks up fluid leaked from blood vessels and returns it to blood. Disposes of debris in the lymphatic stream. Houses white blood cells involved in immunity.