Q.1. Name three different glands associated with the digestive system in humans. Also name their
secretions.
Q. 2. (a) Draw a well labelled diagram of human alimentary canal, and label the following parts:
(i) Liver
(ü) Pancreas
(ii) Small intestine
(iv) Large intestine.
(b) What is peristaltic movement ?
Q.3. i) Draw the human respiratory system and label the following- lungs,bronchi and alveolar sac
ii) During breathing cycle, what is the advantage of residual volume of air in lungs? Explain
Answers
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Answer:
Food is crushed and cut in the mouth with the help of teeth and is mixed with saliva that is secreted by three salivary glands(one below the tongue and two at the side of the jaw) to make it wet and slippery, this process is known as mastication.
Food is crushed and cut in the mouth with the help of teeth and is mixed with saliva that is secreted by three salivary glands(one below the tongue and two at the side of the jaw) to make it wet and slippery, this process is known as mastication.(ii) Saliva contains amylase that breaks down complex carbohydrates and the tongue helps in pushing the food to the next part of the alimentary canal.
Food is crushed and cut in the mouth with the help of teeth and is mixed with saliva that is secreted by three salivary glands(one below the tongue and two at the side of the jaw) to make it wet and slippery, this process is known as mastication.(ii) Saliva contains amylase that breaks down complex carbohydrates and the tongue helps in pushing the food to the next part of the alimentary canal.(iii) The soft food then passes through the oesophagus in a wave-like movement known as a peristaltic movement.
Food is crushed and cut in the mouth with the help of teeth and is mixed with saliva that is secreted by three salivary glands(one below the tongue and two at the side of the jaw) to make it wet and slippery, this process is known as mastication.(ii) Saliva contains amylase that breaks down complex carbohydrates and the tongue helps in pushing the food to the next part of the alimentary canal.(iii) The soft food then passes through the oesophagus in a wave-like movement known as a peristaltic movement.(iv) In the stomach, food mixes with gastric juices and dil. HCl. The food is broken down to simple substances with the help of digestive enzymes like pepsinogen, while