EVERYDAY SCIENCE

Detailed explanation-1: -’Extra’ means outside, hence extracellular digestion occurs outside the cell. During extracellular digestion, food is broken down outside the cell either mechanically or with the help of enzymes. Cells which are in near vicinity absorb the broken down nutrients.

Detailed explanation-2: -The two main types of digestion are intracellular and extracellular digestion. Intracellular digestion occurs inside of the cell, while extracellular digestions happen outside of the cell.

Detailed explanation-3: -So, the correct answer is ‘Saprotropic’.

Detailed explanation-4: -Most multicellular animals possess some sort of digestive cavity-a chamber opening to the exterior via a mouth-in which digestion takes place. The higher animals, including the vertebrates, have more elaborate digestive tracts, or alimentary canals, through which food passes.

Detailed explanation-5: -A large part of digestion occurs in the stomach, shown in Figure 15.11. The stomach is also the major site for protein digestion in animals other than ruminants. When digesting protein and some fats, the stomach lining must be protected from getting digested by pepsin.