state three major functions of arteries veins and capillaries
Answers
The Three Major Types of Blood Vessels:
Arteries, Veins, and Capillaries. ...
Oxygenated Blood Flows Away from the Heart Through Arteries. ...
Veins Carry Blood Back Toward the Heart. ...
Exchange of Gases, Nutrients, and Waste
Between Blood and Tissue Occurs in the Capillaries.
Answer:
1) Arteries - Arteries carry oxygen-rich blood away from the heart to all of the body's tissues. They branch several times, becoming smaller and smaller as they carry blood farther from the heart and into organs.
2) Capillaries - These are small, thin blood vessels that connect the arteries and the veins. Their thin walls allow oxygen, nutrients, carbon dioxide, and other waste products to pass to and from cells.
3) Veins - These are blood vessels that take blood back to the heart; this blood contains less oxygen and is rich in waste products that are to be excreted or removed from the body. Veins become larger as they get closer to the heart. The superior vena cava is the large vein that brings blood from the head and arms to the heart, and the inferior vena cava brings blood from the abdomen and legs into the heart.