Explain in brief. Q1.Distinguish between external and internal respiration?Q2.How do the alveoli functions?Explain with a diagram.Q3. What is the haemoglobin in respiration?Q4.What is the role of the diaphragm and the ribcage in breathing?
Answers
Answer:
external repiration occurs in mammals or vertebrates and external respiration occurs in single cell organisms like bacteria
Answer:
1A) External respiration occurs in the lungs where oxygen diffuses into the blood and carbon dioxide diffuses into the alveolar air. Internal respiration occurs in the metabolizing tissues, where oxygen diffuses out of the blood and carbon dioxide diffuses out of the cells.
2A) Alveoli are an important part of the respiratory system whose function it is to exchange oxygen and carbon dioxide molecules to and from the bloodstream. These tiny, balloon-shaped air sacs sit at the very end of the respiratory tree and are arranged in clusters throughout the lungs.
(I AM SO SORRY I COULD NOT EXPLAIN WITH DIAGRAM.BECAUSE I HAVE NO TIME)
3A) Haemoglobin is the carrier of oxygen to all the living cells for cellular respiration. Oxygen present in haemoglobin is used and carbon dioxide released during cellular respiration combines with haemoglobin. This blood is termed impure or deoxygenated blood. This impure blood is carried to lungs.
4A) 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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