Cerebrospinal fluid is secreted by

Options

A. Ependymal epithelium
B. Choroid plexus
C. Pituitary body
D. Pineal body

Answer

**Step-by-Step Solution:**

1. **Understanding Cerebrospinal Fluid (CSF):**
- Cerebrospinal fluid (CSF) is a clear fluid found in the brain and spinal cord. It serves several important functions, including acting as a shock absorber to protect the brain and spinal cord from injury.

2. **Identifying the Source of CSF:**
- The primary structure responsible for the secretion of cerebrospinal fluid is the **choroid plexus**. This structure is located within the ventricles of the brain.

3. **Location of Choroid Plexus:**
- The choroid plexus is found in the **lateral ventricles** and the **fourth ventricle** of the brain. These are specific areas where CSF is produced.

4. **Evaluating the Options:**
- The question may provide multiple-choice answers. We need to evaluate each option to determine which one correctly identifies the source of CSF:
- **Option A: Ependymal cells** - While these cells line the ventricles and help in the transportation of substances, they do not secrete CSF. Therefore, this is incorrect.
- **Option B: Choroid plexus** - This is the correct answer, as it is the structure that secretes CSF.
- **Option C: Pituitary body** - This gland regulates other endocrine glands but does not produce CSF. Hence, this option is incorrect.
- **Option D: Pineal body** - Similar to the pituitary, the pineal body is an endocrine gland and does not secrete CSF. This option is also incorrect.

5. **Conclusion:**
- After evaluating all the options, we conclude that the cerebrospinal fluid is secreted by the **choroid plexus**.

**Final Answer:**
Cerebrospinal fluid is secreted by the **choroid plexus**.

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