The action research process is an interactive method of collecting information. In the field of education, action research is used quite often to explore new ways of teaching and interacting in the classroom.
Unlike arteries, veins contain valves that ensure blood flows in only one direction. (Arteries donât require valves because pressure from the heart is so strong that blood is only able to flow in one direction.) Valves also help blood travel back to the heart against the force of gravity.rteries carry oxygenated blood away from the heart. Theyâre tough on the outside but they contain a smooth interior layer of epithelial cells that allows blood to flow easily. Arteries also contain a strong, muscular middle layer that helps pump blood through the body.
If you put all vessels together (veins, arteries, venules, arterioles, capillaries) in a single strand, you would have a long enough strand to reach twice around the earth! We'll start with the systemic circuit: and we'll start with the blood in the left side of the heart. The arteries are blood vessels which carry blood away from the heart. The main artery is the aorta, which carries oxygenated blood from the heart to the rest of the body. The pulmonary artery carries deoxygenated blood from the right ventricle to the lungs. 25 people found this useful.