The main function of capillaries is enabling the exchange between water, oxygen, carbon dioxide, nutrients and many other substances between blood and the surrounding tissues. The capillaries also connect the arterioles ... More »

Capillaries are extremely small blood vessels responsible for the delivery of essential nutrients directly to tissues throughout the body. They also help the body circulate blood and remove waste from its organs. More »

According to Springfield Technical Community College, lymph capillaries collect the fluid that collects in between the body’s cells. This extracellular fluid is created when fluid is forced through the walls of the capil... More »

The capillaries are responsible for the interchange of oxygen, carbon dioxide, water, nutrients and waste products between blood and surrounding tissues. The capillaries are the smallest of the blood vessels. More » Science Human Anatomy Blood

The blood transports oxygen, carbon dioxide, nutrients, water, hormones, waste substances and heat. The waste substances are moved to the liver and kidneys, which remove toxins from the blood. Urea is moved from the live... More »

The main function of the alveoli is the exchange of carbon dioxide for oxygen in the lungs. Alveoli are small air sacs of the respiratory system. For this gas exchange to occur, air must travel through different parts of... More » Science Human Anatomy

The blood-brain barrier refers to the lining of capillaries in the brain with tightly packed endothelial cells, creating a semi-permeable membrane that blocks many substances from passing out of or into the brain through... More » Science Human Anatomy