A temporary endocrine gland in humans is

Options

A. Islets of langerhans
B. Pineal body
C. Corpus luteum
D. corpora allata

Explanation

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks for a temporary endocrine gland in humans. This means we need to identify an endocrine gland that does not have a permanent function and can degenerate or cease to function under certain conditions.

2. **Evaluate the Options**: The options provided are:
- Aisles of Langerhans
- Pineal body
- Corpus luteum
- Corpora lutea

3. **Analyze Each Option**:
- **Aisles of Langerhans**: These are clusters of cells in the pancreas that function as an endocrine gland. They are responsible for producing hormones involved in glucose metabolism. Since they are always present in the pancreas and continuously function, they are not temporary.
- **Pineal Body**: This is a small gland located in the brain that produces melatonin, which regulates sleep patterns. It is a permanent gland and does not degenerate, so it is not the correct answer.
- **Corpus Luteum**: This structure forms in the ovary after ovulation when the Graafian follicle releases an egg. It acts as an endocrine gland during pregnancy by producing hormones such as progesterone and estrogen. However, if fertilization does not occur, the corpus luteum degenerates and ceases to function, making it a temporary endocrine gland.
- **Corpora Lutea**: This term refers to the plural form of corpus luteum and does not change the nature of its function.

4. **Conclusion**: After analyzing all options, the only temporary endocrine gland in humans is the **Corpus Luteum**. Therefore, the correct answer is option C.

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