Which one is endocrine ?

Options

A. Brunner's gland
B. Crypts of Lieberkuhn
C. Pars radiata
D. Juxtaglomerulus.

Answer

To determine which option is an endocrine gland, let's analyze each option step by step:

### Step 1: Analyze Brunner's Gland
- **Brunner's Gland**: These glands are located in the small intestine and secrete intestinal juices through ducts.
- **Conclusion**: Since they secrete substances through ducts, they function as exocrine glands, not endocrine glands.

### Step 2: Analyze Crypts of Lembergan
- **Crypts of Lembergan**: Also known as Paneth cells, these are tubular glands in the small intestine that help in the secretion of intestinal juices.
- **Conclusion**: Like Brunner's glands, they also secrete substances through ducts, classifying them as exocrine glands.

### Step 3: Analyze Pars Radiata
- **Pars Radiata**: This refers to the medullary rays in the kidney, which are extensions of the renal medulla into the renal cortex.
- **Conclusion**: This structure does not secrete hormones and is not classified as an endocrine gland.

### Step 4: Analyze Juxtaglomerular Cells
- **Juxtaglomerular Cells**: These cells are located in the kidneys and secrete hormones such as renin and erythropoietin.
- **Conclusion**: Since they secrete hormones directly into the bloodstream, they function as endocrine glands.

### Final Conclusion
- The only option that qualifies as an endocrine gland is **Juxtaglomerular Cells** (Option D).