Human Body System(Circulatory)
Austin And Jordan
Circulatory System Function
Definitions in the Circulatory System
Arteries have a thick outer layer of longitudinal collagen and elastic fibers to avoid leaks and bulges. Also the narrow lumen maintains the high pressure inside the arteries.
Veins are made up of thin layers with a few circular elastic fibres and muscle fibres. Veins also have thin walls which allows the near by muscles to press against them so that they become flat. This helps the blood to be pushed forwards towards the heart.
Capillaries are made up of a wall that is only one cell layer thick and results in the distance for diffusion in and out of the capillary being very small so that diffusion can occur rapidly. They also contain pores within the their wall which allow some plasma to leak out and form tissue fluid.
Define Blood Route
Define Blood Composition
Plasma-When the blood cells are suspended.
Erythrocytes-Carry oxygen from the lungs to the rest of the body.
Leukocytes-Help fight infections and aid in the immune process. Types of white blood cells.
Platelets-Help in blood clotting.
2 Disorders in the Circulatory System
Hypertension- Commonly called high blood pressure. Causes the heart to work harder and can lead to such complications as a heart attack, a stroke, or kidney failure.