Question

Find the odd-man-out:

(a) gastric juice, intestinal juice, saliva, alveoli.

(b) diaphragm, pancreas, alveoli, trachea.

Answer 1

(a) Alveoli

Gastric juice, intestinal juice and saliva are associated with the process of digestion whereas alveoli are minute sac−like structures that are associated with the process of respiration.

(b) Pancreas

Diaphragm, alveoli and trachea are the organs of the respiratory system whereas pancreas play an important role in digestion by secreting pancreatic juice.