Question

Which of the following is present in man but
absent in frogs ?
(a) Salivary gland (b) Adrenal gland
(c) Thyroid gland (d) Pancreas

Answer 1

(a) Salivary gland is present in humans, but absent in frogs.

• The digestive system of a man consists of a developed and complete food canal along with digestive glands. In frog, the salivary glands are absent.

• In humans, the enzymes are secreted by the salivary gland in the mouth which help in the carbohydrate digestion. Whereas, In frogs, the gland is missing.

• For mammals the salivary glands are exocrine glands that contain saliva through a duct system. Human beings have three major salivary glands for pair.