Question

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 diaphragam during inhalation and exhalation

Answer 1

Answer:

ANS 1:A normal trachea (windpipe) has many rings made of cartilage (a strong and flexible tissue). These rings are C-shaped and support the trachea but also allow it to move and flex when your child breathes. Complete tracheal rings are a birth defect in these rings that causes them to be O-shaped instead of C-shaped.

ANS 2:Diffusion is insufficient to meet the oxygen requirement of multicellular organisms like human because all the cells are not direct contact in environment and diffusion is a slow process. Diffusion is too slow to cover the distance between the gas exchange surface and the sites where the oxygen is required. That is why we need a gas transport system - the bloodstream. It would be difficult to allow passive diffusion to transfer oxygen because there would need to be gradients across each and every cell. In the end, it would be too slow and impractical for any multicellular organism to use

ANS 3:A large dome-shaped muscle under the lungs called the diaphragm squeezes downward when you breathe in, making a vacuum that causes a rush of fresh air into your lungs. The opposite happens when you breathe out -- your diaphragm relaxes upward, pushing on your lungs, letting them deflate.

Answer 2

Answer:

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Explanation:

1. rings of incomplete cartilage are present in our trachea so that it won't just lose balance and fall off. So you can say it is kind of a support

2. oxygen is transported by RBC/RED BLOOD CELLS/ERYTHROCYTES. They contain a pigment made called haemoglobin which kind of traps the oxygen molecules. when these RBCs pass near cells via capillaries naturally the oxygen level in the blood vessel is higher than in the cells. Therefore the oxygen molecules diffuse from the higher concentration in the blood vessel to the lower concentration in the cells

3.during inhalation diaphragm flattens so that the lungs could have space to expand. During exhalation the diaphragm moves up to push the air in the lungs out