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Question 28

Label the following parts in Figure 2.2 and name them.

(a) The largest gland in our body.

(b) The organ where protein digestion starts.

(c) The organ that releases digestive juice into the small intestine.

(d) The organ where bile juice is stored.


Solution


(a) The liver is the largest gland in the human body. The liver is located at the upper part of the abdomen in the right side. It is reddish brown in colour and secretes bile. The bile juice helps in the digestion of fat.  

 (b) The stomach releases hydrochloric acid and digestive juices which acts on food. The digestive juices break down the proteins into proteins simpler substances. The stomach is the widest part of the alimentary canal. It is a thick-walled bag and has a flattened U shape. It secretes mucous, hydrochloric acid and digestive juices. 

 (c) The pancreas releases digestive juice into the small intestine. It is a large cream coloured gland located just below the stomach. The pancreatic juice acts on carbohydrates and proteins and changes them into simpler forms.

 (d) The bile secreted by the liver is stored in a sac called the gall bladder. It temporarily stores bile. The bile helps in the digestion of fats.


Biology
NCERT Exemplar
Standard VII

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