Question

From class 10 ncert ch-6
1. What is the function of rings of cartilage?

2. How is oxygen transported in large multicellular

organisms like humans ?

3. Explain the movement of diaphragm during inhalation and exhalation.

Answer 1

Answer:

1) To prevent collapse of trachea

2. With the help of blood.

3. Inhalation-expands Exhalation-contracts

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Answer 2

Answer:

1.The C-shaped cartilaginous rings allow the trachea to collapse slightly at its opening, so food can pass down the esophagus after swallowing. The epiglottis closes the opening to the larynx during swallowing to prevent swallowed matter from entering the trachea.

2.In the capillaries, oxygen is transported within red cells through the solution of hemoglobin, then through the cell membrane and the blood plasma. Since cells and plasma are in motion, both convection and diffusion (free and facilitated) may be important

3.When you breathe in, or inhale, your diaphragm contracts and moves downward. This increases the space in your chest cavity, and your lungs expand into it. The muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale.

Explanation:

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