What does the vascular system primarily consist of?

The vascular system primarily consists of vessels and tissues that are responsible for the circulation of blood throughout the body. This system includes several types of blood vessels, such as arteries, veins, and capillaries, which play a crucial role in transporting oxygen, nutrients, hormones, and waste products to and from various tissues and organs.

The tissues associated with the vascular system include vascular smooth muscle and endothelial cells, which line the blood vessels. These components work together to regulate blood flow and pressure, ensuring that the body's tissues receive adequate blood supply for optimal function.

The other options mention components that are not directly involved in the vascular system. For instance, nerve endings and muscle tissue are part of the nervous and muscular systems, respectively, while bone and cartilage are associated with the skeletal system, and fat and connective tissue serve different functions within the body. Hence, vessels and tissues accurately capture the primary components of the vascular system.