Match the following. 1. Saliva Breathing 2. Lungs Reproduction 3. Blood Digestion 4. Kidney Circulation 5. Testes Excretion 6. Brain Sense organ 7. Skin Voluntary actions

1. Saliva- Digestion. Saliva is the watery liquid secreted into the mouth by the salivary glands. As the food is chewed between the teeth, it mixes with saliva and become slimy. 2. Lungs- Breathing. Lungs are the main organs of the respiratory system. When we breathe in oxygen enters into the lungs with air. The blood carries this oxygen from lungs to the all parts of the body. 3. Blood- Circulation. The circulatory system is a system consisting of blood, blood vessels, and the heart. The heart pumps the blood throughout the body. 4. Kidney- Excretion. Kidneys are the main organ of the excretory system. It filters the blood and removes waste from it in the form of urine. The urinary bladder, Ureter, and urethra are other organs of the excretory system. 5. Testes- Reproduction. Testes are the reproductive organs in males. It produces the male reproductive cell called the sperm. 6. Brain- Voluntary actions. The brain is the main organ of the nervous system. It controls the thoughts, memory and speech, movement of the arms and legs, and the function of many organs within our body. When an action is produced with the involvement of thoughts, it is called voluntary action. 7. Skin- Sense organ. Skin is an example of sense organ. We can feel the touch by the skin. The eye, nose, ear, tongue are some other example of sense organ.