Blood Vessels 11 c Think write Pair Share
Blood Vessels 11 c
Think (write), Pair, Share • Tell me everything you know about Arteries • Then, tell me everything you know about veins
The Vessel System • Much like the roadway system through the body – Freeways – Surface Streets – Alleys
Blood Vessels: The Vascular System · Function: Taking blood to the tissues and back · Arteries · Arterioles · Capillaries · Venules · Veins Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 11. 23
The Vascular System Figure 11. 8 b Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 11. 24
Blood Vessels • Arteries – Function: Carry blood away from the heart – Thick, strong vessel walls – Very high pressure – Part of the Freeway System
The Vascular System Figure 11. 8 b Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 11. 24
Blood Vessels • Arterioles – Branches off of arteries that connect to capillaries – Like surface streets
The Vascular System Figure 11. 8 b Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 11. 24
Blood Vessels • Capillaries – Function: allow transfer of substances between blood and body cells – Smallest blood vessels - only 1 cell thick!!! – Connect on one side to arterioles and on the other side to venules – Like the alleyways of the vascular system
The Vascular System Figure 11. 8 b Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 11. 24
Blood Vessels • Venules – Branches off of veins that connect to capillaries – Like surface streets
The Vascular System Figure 11. 8 b Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 11. 24
Blood Vessels • Veins – Function: bring blood back to the heart – Thinner than arteries • Not as much pressure – Have valves to help keep blood moving back toward the heart – Very low pressure – Part of the freeway system
The Vascular System Figure 11. 8 b Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 11. 24
Quick Quiz • Why are Arteries and Veins considered to be the freeways of the vascular system? • What is the function of capillaries?
Movement of Blood Through Vessels · Most arterial blood is pumped by the heart · Veins use the milking action of muscles to help move blood Figure 11. 9 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 11. 27
Capillary Beds · Capillary beds consist of two types of vessels · Vascular shunt – directly connects an arteriole to a venule Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Figure 11. 10 Slide 11. 28 a
Capillary Beds · True capillaries – exchange vessels · Oxygen and nutrients cross to cells · Carbon dioxide and metabolic waste products cross into blood Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Figure 11. 10 Slide 11. 28 b
Diffusion at Capillary Beds Figure 11. 20 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 11. 29
Major Arteries of Systemic Circulation Figure 11. 11 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 11. 30
Major Veins of Systemic Circulation Figure 11. 12 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 11. 31
Arterial Supply of the Brain Figure 11. 13 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 11. 32
Hepatic Portal Circulation Figure 11. 14 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 11. 33
Quick Quiz • What are the two types of capillary vessels and what are their functions? • Explain how blood travels back to the heart through veins, where there is very low pressure.
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