In which of the following places is the cellulose of food digested by the action of certain bacteria in animals like horses, rabbit, etc.?

Correct option is A

The correct answer is (A)  ​Caecum

• ​In animals like horses and rabbits, the digestion of cellulose from plant-based food takes place in the caecum with the help of specific bacteria.
  
• The caecum is a large, pouch-like structure located between the small intestine and the large intestine.
• It is especially large and well-developed in herbivores such as rabbits and horses.
  
• The caecum contains symbiotic bacteria and protozoa that break down cellulose into simpler, soluble sugars.
• These microbes help digest tough plant materials, and in return, they receive nitrogen-rich nutrients from the host animal.
  

Information booster:

Small intestine

• ​The small intestine is a long, coiled tube in the digestive system where most nutrient absorption takes place.
• It is divided into three parts: the duodenum, jejunum, and ileum.
• The small intestine receives partially digested food from the stomach and mixes it with digestive juices from the pancreas and bile from the liver.
  

​Oesophagus

• ​The oesophagus is a muscular tube that connects the throat (pharynx) to the stomach.
• It transports food and liquids through a series of rhythmic contractions called peristalsis.
• The oesophagus has a sphincter at its lower end that prevents stomach acids from flowing back into the tube, ensuring one-way movement of food.
  

​Stomach

• The stomach is a sac-like organ in the digestive system that breaks down food into a semi-liquid form called chyme.
• It secretes gastric juices containing hydrochloric acid and digestive enzymes like pepsin, which help digest proteins.
• The stomach's muscular walls churn food, aiding in mechanical digestion.