How do holocrine and merocrine glands differ from each other ?

Explanation

### Step-by-Step Solution:

1. **Definition of Glands**:
- Glands are specialized cells or groups of cells that secrete substances. They can be classified into two main types: exocrine and endocrine. Exocrine glands secrete their products into ducts that lead to the external environment or into the bloodstream.

2. **Holocrine Glands**:
- Holocrine glands are a type of exocrine gland. In these glands, the entire cell disintegrates to release its secretion. This means that when the gland secretes its product, the whole cell is lost in the process. An example of holocrine glands is the sebaceous (oil) glands in the skin, which secrete sebum.

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