What is one of the primary functions of blood?

One of the primary functions of blood is the transport of oxygen (O2) from the lungs to the tissues and the removal of carbon dioxide (CO2) from the tissues to the lungs for exhalation. This is essential for cellular respiration, as oxygen is required by cells to produce energy. Blood also carries nutrients from the digestive system to the cells and removes metabolic wastes to organs such as the kidneys and liver for excretion.

In addition to oxygen transport, blood plays a critical role in maintaining homeostasis, including pH balance and temperature regulation. The ability to efficiently transport gases and waste products highlights the importance of blood in supporting cellular and systemic metabolic processes. This function is vital for sustaining life and ensuring that all bodily systems operate effectively.