Draw a neat diagram of the "Microscopic Structure of an intestinal villus" and label the parts given below :

1. Epithelium
2. Capillaries
3. Lacteals

Answer the following questions :

(a) What is the advantage of having a large number of villi on the inner surface of small intestine ?

(b) Write the important role of lacteals.

(c) Name the juice secreted from the glandular cells of small intestine.

(d) Name the specific secretions of:

1. Salivary gland
2. Stomach
3. Liver
4. Pancreas

Below is the labelled diagram of the "Microscopic Structure of an intestinal villus":

(a) A large number of villi enormously increase the inner surface area of the small intestine which facilitates the absorption of digested food.

(b) The fatty acids and glycerol are absorbed into the lacteals to enter the lymphatic system which forms a network all over the body to ultimately empty its contents into the blood stream.

(c) Intestinal juice

(d)

1. Salivary gland - Saliva (amylase)
2. Stomach - Gastric juice
3. Liver - Bile
4. Pancreas - Pancreatic juice