Blood Vessel Structure, Arteries, and Veins PART A:...

Blood Vessel Structure, Arteries, and Veins PART A: Assessments 1. Sketch and label a section of an arterial wall next to a section of a venous wall in each circle that represents the field of view as seen through the microscope. A1 Artery wall (____X____) Vein wall (____X____) 2. Describe the differences you noted in the structures of the arterial and venous walls. Mention each of the three layers of the wall. A1 CRITICAL THINKING ASSESSMENT Explain the functional significance of the differences you noted in the structures of the arterial and venous walls. A1 PART B: Assessments Complete the following: 1. How did you distinguish between arterioles and venules when you observed the vessels in the web of the frog's foot? A2

Transcript

00:01 Hello students, here we have multiple questions to answer.

00:04 Let us discuss one by one.

00:06 First we have to compare and contrast arterioles and venules.

00:11 Arterioles are small arteries that regulates blood flow to the capillaries and they have smooth muscle walls that can constrict or dilate.

00:24 Then venules are the small veins that collect blood from the capillaries and begins the return of blood to the heart and they are thinner walled than arterioles.

00:38 Then the structural adaptation of the arteries and veins.

00:45 Arteries have thicker walls with more elastic and smooth muscle tissues allowing them to handle higher pressure and veins have thinner walls, less muscle and are equipped with valves to prevent backflow.

01:10 And then the function of vascular anastomosis.

01:18 An anastomosis is a connection between the blood vessels.

01:22 It allows alternative routes for blood flow and providing collateral circulation if one vessel is blocked.

01:32 Then blood flow, blood pressure and peripheral resistance.

01:38 Blood flow is the movement of blood through the vessels.

01:44 Blood pressure is the force exerted by blood against vessel walls.

01:56 Then the peripheral resistance is the opposition to blood flow caused by the friction between blood and vessel walls.

02:13 Pulmonary circuit, it carries blood between the heart and lungs for oxygenation.

02:26 Then systemic circuit carries oxygenated blood from the heart to the body's tissue.

02:38 Blood pressure is highest in arteries and it is lower in capillaries and lowest in veins.

02:50 Map means mean arterial pressure is calculated as diastolic pressure plus one third of the pulse pressure.

03:05 Venous return is aided by skeletal muscle contraction, respiratory movements and one -way walls...

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