Why are endocrine glands called ductless glands ?

Explanation

### Step-by-Step Solution:

1. **Definition of Endocrine Glands**: Endocrine glands are specialized organs in the body that produce and secrete hormones directly into the bloodstream.

2. **Lack of Ducts**: Unlike exocrine glands, which have ducts that transport their secretions to specific sites (like sweat glands or salivary glands), endocrine glands do not have such ducts.

3. **Secretion Process**: Endocrine glands release their hormones directly into the venous blood or lymphatic system. This means that the hormones are distributed throughout the body via the circulatory system.

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