The artery and vein.
Arterioles
venules
well form the legs it would be The great saphenous vein and femoral vein that empty into the inferior vena cave, which leads back to the heart
these are not called blood tubes they are called blood vessels and their are three types of blood vessels arteries which divides into arterioles and arterioles re divide into capillaries capillaries join to form venule and venule join to form veins.
Capillaries do
Capillary are the smallest of the body's blood vessels and connect and break off into other arteries, blood vessels, or other areas of the body. Capilaries usually are found in between the major blood vessels and the tissue and can carry water, oxygen, carbon dioxide(CO2) The capillaries are one of the commonly used blood vessels in your body. They help join together all arterioles and venules in the body and connects the minor blood vessels in the heart.The function of capillaries is to deliver oxygen and other nutrients to the cells of the body, and remove toxins including carbon dioxide. Capillaries are only one cell thick, and have the lowest blood pressure of any blood vessel in the body.The function of the capillaries is to transfer oxygen and nutrients from the bloodstream to the various body tissues.to exchange the materials between the blood and the body cells
The three main blood vessels are the arteries, veins, and the capilliaries.Arteries carry blood away from the heart. Blood from the arteries is under high pressure since it has just come from the heart. A cut in the artery may be fatal due to blood loss. However, it's thickness, elasticity, and location protect it from damage.Capillaries are extremely thin. Only a single file of red blood cells can pass through the capillaries. However, the actual exchange of substances in the body occurs in the capillaries.Capillaries join to form venules. These small vessel units form veins. Veins carry non-oxygenated blood to the heart.
There are two main types of circulatory systems:1. Open2. ClosedIn an open circulatory system, blood mixes with internal organs directly. Organisms with this type of system do not have a true heart or capillaries. Instead of a true heart, there are blood vessels that act as pumps to force the blood along. Instead of capillaries, blood vessels join directly with open sinuses.In a closed circulatory system, blood is pumped through a closed system of arteries, veins, and capillaries.(:
The right and left vertebral arteries join together to form a single basilar artery at the base of the skull.
cappillaries==============The smallest veins in the body are the venules. Capillaries join venules and arterioles (the smallest arteries) together. Arteries carry the blood from the heart around the whole body; while veins carry the blood back to the heart. They are joined by the capillaries, where the most important actions happen.More information in related links.
From the arteries, the blood flows into the capillaries where food and oxygen diffuse through the one-cell-thick capillary walls and into the cells. Carbon dioxide and cellular wastes then diffuse into the blood. The capillaries then form veins. The veins then lead back to the heart so the blood can be sent to the lungs to be oxygenated. The blood is then pumped through the arteries to the rest of the body again.
The blood cells join together till they form a wall. Then they harden and become a scab.
Oxygenated blood gets to the hearts muscles through three coronary arteries that are outside the heart. They branch from the aorta just above the left ventricle and conduct blood through smaller arteries and capillaries into the walls of the heart. Veins passing through the heart join to form the coronary sinus, a cavity from which venous blood flows into the right atrium.