Which of these canals are correctly matched with the organ that they are located in? l. Central canal: vertebral column ll. Neural canal: spinal cord lll. Canal of schlemn: eye lV Semicircular canal: ear

Options

A. I , II and IV
B. I and II
C. III and IV
D. I, II , III and IV

Answer

To solve the question of which canals are correctly matched with their respective organs, we will analyze each option step by step:

1. **Central Canal: Vertebral Column**
- The central canal is a narrow channel that runs through the spinal cord, not the vertebral column itself. It is responsible for the transportation of cerebrospinal fluid (CSF) from the brain to the spinal cord. Therefore, this match is **incorrect**.

2. **Neural Canal: Spinal Cord**
- The neural canal is associated with the embryonic development of the spinal cord and is located within the vertebrae during the embryonic stage. It does not refer specifically to the spinal cord in adults. Thus, this match is also **incorrect**.

3. **Canal of Schlemm: Eye**
- The canal of Schlemm is indeed located in the eye. It is responsible for draining aqueous humor from the anterior chamber of the eye, thus maintaining fluid homeostasis. This match is **correct**.

4. **Semicircular Canal: Ear**
- The semicircular canals are structures in the inner ear that are involved in maintaining balance and spatial orientation. They are correctly matched with the ear. This match is also **correct**.

Based on the analysis:
- The correct matches are:
- Canal of Schlemm: Eye (Correct)
- Semicircular Canal: Ear (Correct)

Thus, the final answer is that options III (Canal of Schlemm: Eye) and IV (Semicircular Canal: Ear) are the only correctly matched pairs.

### Summary of the Correct Matches:
- Canal of Schlemm: Eye (Correct)
- Semicircular Canal: Ear (Correct)