In human _______ is a small blind sac which hosts some symbiotic micro-organism

Options

A. Caeccum
B. Colon
C. Rumen
D. All of these

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks for a small blind sac in humans that hosts symbiotic microorganisms.

2. **Understand the Structure**: In human anatomy, we need to identify which part of the digestive system is described as a "small blind sac."

3. **Consider the Options**: The options provided include various parts of the digestive system. The key term here is "blind sac," which refers to a structure that does not have an exit or opening on one end.

4. **Analyze the Cecum**: The cecum is the first part of the large intestine and is indeed a small blind sac. It is located at the junction of the small intestine and the large intestine.

5. **Function of the Cecum**: The cecum hosts symbiotic microorganisms, which are beneficial bacteria that aid in digestion, particularly in the breakdown of cellulose from plant material.

6. **Eliminate Incorrect Options**:
- The colon is not a blind sac; it is a continuation of the large intestine.
- The rumen is found in ruminants (like cows) and is not present in humans.

7. **Conclusion**: Based on the analysis, the correct answer is that in humans, the cecum is a small blind sac that hosts some symbiotic microorganisms.

**Final Answer**: In humans, the cecum is a small blind sac which hosts some symbiotic microorganisms.

---