3) Ruminants have a special bag like structure called caecum.
4) Arteries carry carbon dioxide rich blood.
5) Human muscles can respire anaerobically.
Answers
Answer:
3)Caecum is the sac like structure present between the small intestine & large intestine in ruminants. Caecum helps in storing and contains certain bacteria that help in the digestion of cellulose. Cellulose being a carbohydrate is not digestible in humans but only in ruminants, carried out by caecum.
4)Carbon dioxide moves from the cells and into the capillaries. Blood leaves the capillary and enters the small venules. These venules become progressively larger vessels called veins. The vena cava are the two largest veins that carry blood into the right upper chamber of the heart (the right atrium).
5)Anaerobic respiration happens in muscles during hard exercise. Glucose is not completely broken down, so less energy is released than during aerobic respiration. There is a build-up of lactic acid in the muscles during vigorous exercise. The lactic acid needs to be oxidised to carbon dioxide and water later.
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