Why is blood needed by all the parts of a body?

Blood is vital for the body as it performs several essential tasks. It delivers oxygen to all body cells, providing energy for daily activities. Nutrients like sugars and proteins are carried by blood from the digestive system to nourish organs and tissues, supporting growth and repair. Blood also collects waste products from cells, like carbon dioxide, and transports them to be expelled from the body. White blood cells in blood fight off germs, keeping the body healthy. Additionally, blood carries hormones that help regulate body functions. Its role in oxygenation, nourishment, waste removal, immunity, and hormonal balance is crucial for maintaining a healthy body.