Sperm after formation is stored in
**Core Concept**
The **epididymis** plays a crucial role in the storage and maturation of sperm after their formation in the **testes**. This process is essential for sperm to gain motility and fertility.
**Why the Correct Answer is Right**
Sperm formed in the **seminal vesicles** are immature and lack motility. As they pass through the **epididymis**, they undergo maturation, gaining the ability to move and fertilize an egg. The **epididymis** stores sperm, allowing them to mature and become fertile.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it's not the primary site for sperm storage.
**Option B:** Incorrect as it's not directly related to sperm storage after formation.
**Option C:** Incorrect because, although related to the male reproductive system, it's not the primary site for sperm storage.
**Clinical Pearl / High-Yield Fact**
The **epididymis** is a long, coiled tube that stores and matures sperm, and any issues with this structure can lead to infertility.
**Correct Answer:** D. Epididymis.