Q: Which parts of our body do we use for seeing, walking, hearing, and writing?
A: (1) Seeing – Eyes
(2) Walking – Legs
(3) Hearing – Ears
(4) Writing – Hands
Q: What are external organs? Can you give examples?
A: External organs are parts of the body that are visible on the outside. Examples include ears, nose, arms, and legs.
Q: Why are some body parts called sensory organs?
A: Certain body parts are called sensory organs because they help us become aware of the environment around us. They include eyes, ears, nose, tongue, and skin.
Q: What is an internal organ?
A: An internal organ is an organ situated inside the body, performing specific functions necessary for bodily processes.
Q: Why is the oesophagus the only internal organ located in the thoracic cavity?
A: The oesophagus is located in the thoracic cavity because it needs to transport food from the mouth to the stomach, which involves passing through the chest area.
Q: How are the flexible walls of the oesophagus useful?
A: The flexible walls of the oesophagus allow it to expand and contract, facilitating the movement of food from the throat to the stomach.
Q: Why does the heart contract and relax continuously?
A: The heart contracts and relaxes continuously to pump blood throughout the body, ensuring oxygen and nutrients are delivered to cells and waste products are removed.
Q: Why does the chest swell up when we breathe in?
A: The chest swells up when we breathe in because the lungs expand to take in air, causing the chest cavity to enlarge.
Q: What are the functions of the lungs?
A: The lungs are responsible for supplying oxygen to the body by taking in air when we breathe in and expelling carbon dioxide when we breathe out.
Q: Which internal organ is situated between the lungs in the thoracic cavity?
A: The heart is situated between the lungs in the thoracic cavity.
