Topic 6; 6.2 Transport System

Draw and label a diagram of the heart showing the four chambers, associated blood vessels, valves and route of blood through the heart

Figure 42.4 The mammalian cardiovascular system: an overview

State that the coronary arteries supply heart muscles with oxygen and nutrients

Figure 42.7 The control of heart rhythm

Explain the relationship between the structure and function of arteries Thick wall to withstand high blood pressure. Thick outer layer of longitudinal collagen and elastic fibers. Thick layers of circular elastic and muscle fibers. walls stretch and recoil for the blood to go from the heart to the small intestine. Narrow lumen to help maintain the high pressure..

Explain the relationship between the structure and function of capillaries Has pores to allow plasma and phagocytes to diffuse in or out. Connects the vein and artery Moist and thin for diffusion and has a short diffusion distance. Narrow diameter and large quantity allow for a large exchange of materials through diffusion

Explain the relationship between the structure and function of veins Thin layers with a few circular elastic and muscle fibers. Thin walls to allow the muscles to squeeze the veins Thin outer layer of longitudinal collagen and elastic fibers. Valves for blood to stay and not flow backwards. Wide lumen to accommodate for the slow flowing of blood

Figure 42.9 Blood flow in veins

State that the following are transported by the blood: nutrients, oxygen, carbon dioxide, hormones, antibodies and heat

State that blood is composed of plasma, erythrocytes, leukocytes, (Phagocytes and lymphocytes) and platelets.