Question

Which of the following parts of the digestive system produces chyme.
A. Small intestine
B. Liver
C. Stomach
D. Mouth

Answer 1

Hint: The human digestive system begins from the mouth and ends at the anus. The organs involved in this process are as follows: mouth, esophagus, pharynx, stomach, small intestine, large intestine, and anus. The organ which plays an important role in churning the food is the stomach.

Complete answer: The human digestive system also called alimentary canal or gastrointestinal canal comprises the following organs: mouth, esophagus, pharynx, stomach, small intestine, large intestine, anus, and also accessory organs.
Let’s understand the role and function of each organ in detail.
Mouth: It is the part of the alimentary canal where the bolus of food is ingested, crushed, and chewed with the help of teeth and tongue. The salivary glands present in the mouth releases saliva which makes the food moist and soluble. The breakdown of carbohydrates takes place in the mouth.
Pharynx: It is the part of both the respiratory system and digestive system. Its role is to conduct food to the oesophagus.
Oesophagus: It is a muscular tube that runs from the pharynx to the stomach and is also called a food pipe. The food is conducted to the stomach via oesophagus by a process called peristalsis. It is the rhythmic movement of relaxation and contraction which pushes the food downward towards the stomach. This rhythmic movement of contraction and relaxation is called peristalsis.
Stomach: It is a J-shaped organ with an oesophagus located above it and a duodenum located at the lower end. Here the churning of food takes place. It acts similar to a mixer in which the food is completely churned. Digestion of protein takes place in the stomach. The food is partially digested in the stomach and is in a semi-liquid form known as chyme.
Small intestine: The small intestine is further divided into 3 parts: duodenum, jejunum, and ileum. Here, the food is completely digested and absorption of nutrients, sugars, amino acids, and fatty acids takes place. The remaining waste exhausted of nutrients is converted into semi-solids known as feces.
Large intestine: In this part, absorption of remaining minerals and water takes place and the feces is pushed into the rectum by the peristalsis movement and is finally expelled through the anus.
So, option C is the correct option.

Note: Other than digestive organs accessory organs also play a vital role in the digestion of food. Accessory organs are as follows: tongue, salivary gland, pancreas, liver, and gallbladder. These organs secrete digestive juices and enzymes which are necessary for the digestion of food. Saliva, amylase, and lipase are secreted by salivary glands. Bile is produced by the liver and the pancreas secretes pancreatic juices.