Endocrine glands can be defined as those glands which pour their secretion :

Options

A. Directly into blood
B. Into blood or ducts
C. When they are cut
D. into particular organ

Answer

**Step-by-Step Solution:**

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

2. **Absence of Ducts**: Unlike exocrine glands, which have ducts to transport their secretions, endocrine glands are often referred to as "ductless glands" because they do not have ducts.

3. **Hormones**: The substances secreted by endocrine glands are known as hormones. These hormones are chemical messengers that travel through the bloodstream to target organs or tissues.

4. **Transport Mechanism**: Once released into the bloodstream, hormones are transported to various parts of the body, where they exert their effects on specific target cells that have receptors for those hormones.

5. **Conclusion**: Therefore, the correct definition of endocrine glands is that they pour their secretion directly into the blood, not into ducts or specific organs.

**Final Answer**: Endocrine glands can be defined as those glands which pour their secretion directly into the blood.

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