What does the cardiovascular system do ?
Functions of the cardiovascular system:
1. Transport of Nutrients: The cardiovascular system works to transport oxygen and nutrients from the digestive system to the various organs and tissues of the body. Oxygen is obtained from the lungs, and nutrients are absorbed from digested food. The heart pumps blood, which carries these vital substances to all cells in the body.
2. Removal of Waste Products: The cardiovascular system helps in the removal of carbon dioxide and other waste products produced by the cells. These waste products are transported to the lungs for elimination through the process of respiration.
3. Regulation of Body Temperature: It also aids in regulating body temperature. When the body temperature increases, the blood vessels near the skin surface dilate, allowing more blood to flow to the skin and releasing heat into the surrounding environment. When the temperature drops, the blood vessels constrict, conserving body heat.
4. Protection against Infection: The cardiovascular system contributes to the body's immune responses. White blood cells, which are part of the immune system, travel throughout the body via the bloodstream to detect and fight infections.
5. Transport of Hormones and Chemical Messengers: Hormones produced by glands are carried to their target cells through the bloodstream. The cardiovascular system enables these hormones to reach the appropriate organs and tissues to perform their regulatory functions.
6. Transport of Oxygen to the Heart Muscles: The cardiovascular system itself requires a constant supply of oxygen and nutrients to function properly. The coronary arteries supply oxygen-rich blood to the heart muscle cells.
In summary, the cardiovascular system is responsible for circulating blood, delivering oxygen and nutrients to cells, removing waste products, regulating body temperature, contributing to immune defense, transporting hormones, and ensuring the heart's oxygen supply. This complex system plays a vital role in maintaining overall health and bodily functions.