2.02 Understand the functions and disorders of the circulatory system What are the functions of the circulatory system? 2.02 Understand the functions and disorders of the circulatory system 1

Vessels of the circulatory system Arteries Describe arterial blood: Dark red in color, highly oxygenated 2.02 Understand the functions and disorders of the circulatory system 2

Vessels of the circulatory system ARTERIES What are the functions of arteries? To push oxygenated blood around the body so that the cells can receive oxygen and nutrients 2.02 Understand the functions and disorders of the circulatory system 3

Vessels of the circulatory system ARTERIES What are the characteristics of arteries? Muscular and thick walled due to the fact that they have to push the blood around the body 2.02 Understand the functions and disorders of the circulatory system 4

Vessels of the circulatory system ARTERIES Which direction do arteries flow? Push or flow blood away from the heart to the cells 2.02 Understand the functions and disorders of the circulatory system 5

Vessels of the circulatory system Veins Describe venous blood: Dark blue, violet in color, deoxygenated 2.02 Understand the functions and disorders of the circulatory system 6

Vessels of the circulatory system VEINS What is the function of veins? Push or flow deoxygenated blood back to the heart. 2.02 Understand the functions and disorders of the circulatory system 7

Vessels of the circulatory system VEINS What are the characteristics of veins? Thin walled, collapse easily when not filled from dehydration. Not muscular but have valves stop blood from flowing backwards 2.02 Understand the functions and disorders of the circulatory system 8

Vessels of the circulatory system VEINS Which direction do veins flow? Push or flow blood towards the heart to get more oxygen 2.02 Understand the functions and disorders of the circulatory system 9

Vessels of the circulatory system Arteries vs Veins Arteries Veins Muscular and thick walled Thin with valves Oxygenated blood Deoxygenated blood Flow away from heart Flow towards heart Red to bright red Dark blue or violet 2.02 Understand the functions and disorders of the circulatory system 10

Vessels of the circulatory system What are capillaries? They are the smallest blood vessels and can only be seen through a compound microscope. They are a single endothelial cell layer thick. 11

Vessels of the circulatory system Capillaries What is the function of capillaries? To connect the arterioles with venules. 2.02 Understand the functions and disorders of the circulatory system 12

Vessels of the circulatory system Capillaries What happens if this action is obstructed? If blocked nutrients and oxygen cannot get through to the cells 2.02 Understand the functions and disorders of the circulatory system 13

Nutrients in blood & circulatory system Circulatory system plays a vital role in homeostasis Absorption and transport of nutrients to cells, tissues,organs, and systems. Vitamin K - prevents hemorrage Vitamin E - prevents hemolysis Vitamin B12 - prevents anemia Calcium aids in blood clotting 2.02 Understand the functions and disorders of the circulatory system 14

2.02 Understand the functions and disorders of the circulatory system Remember Pulse Sites? Where do they come from? They come from any place that allows an artery to compressed against a bone. Radial Temporal Brachial Facial Ulnar Carotid Popliteal tibialis Femoral dorsalis pedis 2.02 Understand the functions and disorders of the circulatory system 15