**Core Concept**
The concept of capacitance vessels refers to a type of blood vessel that plays a crucial role in regulating blood pressure and maintaining peripheral resistance. These vessels have a large capacity to hold blood, and their primary function is to store blood when it is not needed in other parts of the body.

**Why the Correct Answer is Right**
Capacitance vessels, also known as venous vessels, have a high capacity to hold blood due to their large diameter and thin walls. This allows them to store blood when it is not needed in other parts of the body, thereby regulating blood pressure and maintaining peripheral resistance. The veins, which are part of the capacitance vessel system, have one-way valves that prevent blood from flowing backwards, ensuring that blood is directed towards the heart.

**Why Each Wrong Option is Incorrect**
* **Option A:** **Arterioles** are resistance vessels, not capacitance vessels. They regulate blood pressure by constricting or dilating, which affects the flow of blood to peripheral tissues.
* **Option B:** **Capillaries** are exchange vessels, where the exchange of oxygen, nutrients, and waste products takes place between the blood and the tissues. They are not primarily involved in regulating blood pressure or storing blood.
* **Option C:** **Arteries** are high-pressure vessels that carry blood away from the heart to the rest of the body. While they can store some blood, their primary function is to transport blood, not to regulate blood pressure or store blood.

**Clinical Pearl / High-Yield Fact**
The capacitance vessel system, including veins, plays a crucial role in regulating blood volume and blood pressure. An increase in capacitance vessel volume can lead to a decrease in peripheral resistance and a subsequent decrease in blood pressure.

**Correct Answer:** .