Term | Definition |
what is the role of blood vessels | carry blood away from the heart, exchanges wastes and materials, and carry blood back to the heart. |
Arteries | carry blood to body, branch into smaller arteries |
Coronary Arteries | carry blood to the heart itself from the aorta, and to the organs |
Epithaical Tissue | inner layer, enables blood flow |
Smooth Tissue | middle layer, relaxes and contracrts allowing arteries to widen and narrow |
Connnective Tissue | outer layer, allows arteries to withstand the force of pumping blood |
What rus through the tissue of the body | blood vessels |
Capilaries | wastes and materials are exchaned,pass easily from the blood, through the capilary walls, and into the body cells, only has epithelial cells, one type is diffusion |
Diffusion | molecules move from and area of higher concentration to an area of lower concentration |
Veins | blood enters here and goes back to the heart, thinner than arteries |
What causes blood pressure | the force with which ventricles contract |
Blood Pressure | force exerted by blood against the walls of blood vessles |