Question
| Organ systems | Organs | Functions |
| 1. Respiratory system | ||
| 2. Circulatory system |
✓
Answer
| Organ systems | Organs | Function |
| 1. Respiratorysystem | Nose | For inhalation and exhalation. The air is filtered and made little warm when breath passes through nose. |
| Pharynx | Common passage for food and air. Leads to trachea and oesophagus | |
| Wind pipe (Trachea) | Takes air to lungs. Bifurcates into two bronchi | |
| Lungs | Provides space for respiratory gaseous exchange. | |
| Alveolus | Actual gaseous exchange by taking in oxygen and giving out carbon dioxide. | |
| Diaphragm | By contractions and relaxation it makes breathing movements possible. | |
| 2. Circulatory system | Heart | Muscular pump that can send the blood throughout the body. |
| Arteries | Carry blood away from heart to all the parts of the body. Except for pulmonary artery, all other arteries carry oxygenated blood to supply oxygen to each and every cell | |
| Veins | Carry blood to the heart. Except for pulmonary veins all other veins carry deoxygenated blood from all the body cells to the heart. | |
| Blood capillaries | Each important vital organ is provided with capillary network. Exchange of oxygen, nutrients, hormones, vitamins, etc. takes place through the capillary wall. Such useful substances are sent towards the cells and waste materials are taken from the cells. | |
| Blood cells | Various functions depending upon the type of blood cells.Blood cellsRBC: Carrying oxygen and carbon dioxide.WBC: Soldiers of the body. Produce antibodies and fight against germs of diseases.Platelets: Carry out important function in blood clotting. | |
| Plasma | Many proteins present in the plasma which carry out definite functions. Plasma also gives fluidity to the blood. |
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