Human Digestive System

Steps involved in the digestive system are- ingestion, digestion, absorption, assimilation, and egestion. Excretion is not a process of the digestive system, but is a process of the excretory system.

Liver produces bile, whereas pancreas secretes pancreatic juice and stomach produces HCl. The function of the gallbladder is to store the bile. So, option (4) is the correct answer.

Taste buds help humans to taste diiferent types of food.

The inner lining of the stomach secretes mucus, which protects the inner membrane from the action of HCl.

The main function of HCl is to convert the pepsinogen (inactive form) to pepsin (active form). Pepsin is an enzyme which is involved in the breakdown of proteins. So, if HCl is not secreted, digestion of proteins cannot take place.

Maximum absorption of water takes place in the large intestine.

Formation of faeces takes place in the large intestine where water is absorbed from the undigested material, resulting in the formation of solid waste called as faeces.

The passing of watery stools from the body is known as diarrhoea, which leads to dehydration, i.e. excess loss of water from the body.

Grass is a fibrous food and takes more time for digestion. In grass eating animals, there is a separate part of stomach called rumen. That is why, these animals are also known as ruminants.

Caseinase is an enzyme that is produced by the human body to help break down milk.

This is the correct answer.

Both these statements are correct.

Breaks down the emulsified fats during digestion of food

This is the correct answer. 

This is the correct answer.