Regeneration after injury is absent in
(a) Nervous tissue
(b) Skin epidermis
(c) Tendon
(d) Smooth muscles

Options

A. Nervous tissue
B. Skin epidermis
C. Tendon
D. Smooth muscles

Answer

To determine which tissue type does not have the ability to regenerate after injury, we can analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding Regeneration**: Regeneration refers to the process by which organisms replace or restore lost or damaged tissues. Different tissues have varying capacities for regeneration.

2. **Analyzing Each Option**:
- **(a) Nervous Tissue**: Nervous tissue, which includes neurons, has a very limited capacity for regeneration. Neurons do not typically undergo cell division due to the absence of centrioles, which are essential for the process of mitosis. Therefore, if nervous tissue is damaged, it does not regenerate effectively.

- **(b) Skin Epidermis**: The skin, particularly the epidermis, has a high regenerative capacity. Skin cells can rapidly divide and replace themselves after injury, making this tissue capable of regeneration.

- **(c) Tendon**: Tendons have a moderate ability to heal and regenerate, although the process can be slow and may not restore full functionality.

- **(d) Smooth Muscles**: Smooth muscle tissue has a relatively good capacity for regeneration. It can undergo mitosis and regenerate after injury.

3. **Conclusion**: Based on the analysis, the tissue that lacks the ability to regenerate after injury is **(a) Nervous Tissue**.

### Final Answer:
Regeneration after injury is absent in **(a) Nervous tissue**.

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