Question

Answer the following in one word.

1. Which organ is called the voice box?

2. Which membrane covers the lungs?

3. What is the muscular sheet below the lungs called?

4. Where does exchange of gases takes place?

5. What is formed when oxygen combines with haemoglobin?​

Answer 1

Answer:

1.larynx

2.There are two layers; the outer pleura (parietal pleura) is attached to the chest wall and the inner pleura (visceral pleura) covers the lungs and adjoining structures, via blood vessels, bronchi and nerves.

3.diaphragm

4.Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.

5.Once oxygen has entered the blood from the lungs, it is taken up by haemoglobin (Hb) in the red blood cells. ... These iron ions (Fe2+) associated with haemoglobin molecules chemically react with oxygen to form oxyhaemoglobin. Each molecule of haemoglobin can hold four oxygen molecules.