Question

Assertion: Caecum is a small blind sac which hosts some symbiotic microorganisms.
Reason: Eschenchia coli in return produces vitamin B12 vitamin K, thiamine and riboflavin.
A. Both assertion and reason are true and reason is the correct explanation of assertion_
B. Both assertion and reason are true but reason is not the correct explanation of assertion.
C. Assertion is true but reason is false.
D. Both assertion and reason are false.

Answer 1

Hint: The large intestine is larger than the small intestine in diameter. It runs from the ileocecal junction to the anus, where the ileum enters the large intestine. The colon, rectum, and anal canal make up the large intestine. The large intestine, unlike the small intestine, does not manufacture digestive enzymes.

Complete answer:
Cecum, often spelled caecum, is a pouch or big tubelike structure in the lower abdominal cavity that takes undigested food from the small intestine and is the first section of the large intestine.
The ileocecal valve (also known as the Bauhin valve) separates it from the ileum (the final segment of the small intestine), which regulates the pace of food entry into the cecum and may help prevent material from returning to the small intestine.
The cecum's major roles are to absorb fluids and salts that remain after intestine digestion and absorption, as well as to mix its contents with mucus, a lubricating substance.
Water and salts are absorbed through the cecum's interior wall, which is made up of a thick mucous membrane. A deep layer of muscular tissue lies beneath that lining, causing churning and kneading actions.
The caecum is a pouch that connects the small and large intestines and contains a variety of bacteria, including E. coli, which generates vitamin K and vitamin B complexes.

'Both assertion and reason are true, and reason is the accurate explanation of assertion,' is the correct option.

Note: Cecum size and structure differ from animal to mammal. The cecum is enlarged in tiny herbivores, such as rabbits, and contains microorganisms that aid in the digestion of plant matter and facilitate nutrient absorption.