Question

Rumen of a cow is a part of its
A. Intestine
B. Stomach
C. Caecum
D. Rectum

Answer 1

Hint: Cow has a ruminant digestive system which helps it to utilize the roughage properly by converting it to usable energy. Stomach is the main component in Ruminants with 4 parts.

Complete Answer:
The rumen stomach occupies 75% of the space in the abdominal region of ruminants like cows. The two larger parts are Rumen and Reticulum followed by omasum and abomasum.

Let us analyse all the options to find the correct answer.
- Option B: Rumen is the largest part of Cow’s stomach. It occupies 84% of the total volume in the stomach and holds approximately 40 gallons in an adult cow. Therefore, this is the correct option.
Rumen harbours microorganisms which are involved in the digestion of cellulose of the plant cell wall. It is responsible for digestion of 50-60% of starch and sugar consumed by cows. Proteins, Vitamin B and K synthesis also take place in Rumen. The pH of Rumen is maintained around 6.5

Therefore, the correct option is B) Stomach.

Note: Rumen also called the first stomach of a ruminant receives food from the oesophagus, performs microbial digestion of the complex food and passes it down to the reticulum. Rumen is fermentation vat where a constant anaerobic environment is maintained.