## **Core Concept**
The process of milk storage and ejection in lactating females involves the **alveoli** and **ducts** of the mammary glands. Milk synthesis occurs in the alveoli, and from there, it is stored until ejection occurs.

## **Why the Correct Answer is Right**
The correct answer, **C. Alveoli and ducts**, is right because milk is synthesized in the **alveoli** of the mammary glands and then stored in the alveoli and the **ducts** until it is ejected. The alveoli are the functional units of the breast where milk production takes place. The ducts collect and transport milk to the nipple.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because it does not accurately represent where milk is stored before ejection.
- **Option B:** This option is incorrect as it does not specify the correct structures involved in milk storage.
- **Option D:** This option is incorrect because it inaccurately describes the storage site of milk.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that the **letdown reflex**, also known as the milk ejection reflex, is crucial for milk ejection from the storage sites (alveoli and ducts). This reflex is mediated by **oxytocin**, which causes the contraction of myoepithelial cells around the alveoli, leading to milk ejection.

## **Correct Answer:** C. Alveoli and ducts.