Semicircular canals of internal ear of a mammal contain a fluid
called

Options

A. Lymph
B. Endolymph
C. Perilymph
D. Haemolymph.

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure**: The semicircular canals are part of the inner ear in mammals. They play a crucial role in maintaining balance and spatial orientation.

2. **Identifying the Fluids**: The inner ear contains several types of fluids. The two main fluids associated with the inner ear are endolymph and perilymph.

3. **Analyzing the Options**:
- **Lymph**: This fluid circulates in the lymphatic system and is not related to the inner ear.
- **Endolymph**: This is the fluid that fills the semicircular canals and is crucial for the function of the inner ear.
- **Perilymph**: This fluid is found in the bony labyrinth and surrounds the membranous labyrinth but does not fill the semicircular canals.
- **Haemolymph**: This is a fluid found in the circulatory system of arthropods and is not relevant to mammals.

4. **Conclusion**: Based on the analysis, the fluid present in the semicircular canals of the internal ear of a mammal is **endolymph**.

5. **Final Answer**: The correct answer is **endolymph**.

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