Endocrine glands

Options

A. Pour their secretion into blood by means of ducts
B. Do not possess ducts
C. Sometimes do not have ducts
D. Always possess ducts.

Answer

### Step-by-Step Solution:

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

2. **Characteristics of Endocrine Glands**:
- Unlike exocrine glands, which have ducts to transport their secretions (like saliva or sweat), endocrine glands do not have ducts. This means they release their hormones directly into the circulatory system.

3. **Definition of Ductless Glands**:
- Because they lack ducts, endocrine glands are also referred to as "ductless glands."

4. **Examples of Endocrine Glands**:
- Common examples include the pituitary gland (often called the "master gland"), hypothalamus, thyroid gland, parathyroid glands, and adrenal glands.

5. **Clarifying the Options**:
- The options provided in the question are:
- A) Pour their secretion into blood by means of ducts
- B) Don't possess ducts
- C) Sometimes don't have ducts
- D) Always possess ducts
- Based on the characteristics of endocrine glands:
- Option A is incorrect because endocrine glands do not use ducts.
- Option B is correct as they do not possess ducts.
- Option C is incorrect because they always lack ducts.
- Option D is incorrect for the same reason.

6. **Conclusion**:
- The correct answer is that endocrine glands "don't possess ducts."