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The key identifies major blood components, heart chambers and valves, pathways of oxygen and nutrient transport, and the routes of fluid exchange between blood and body tissues via capillaries. This document contains an answer key for a biology worksheet on the circulatory system.
Elastic arteries include the largest arteries in the body, those closest to the heart, and give rise to the smaller muscular arteries. The pulmonary arteries, the aorta, and its branches together comprise the body’s system of elastic arteries.
Activity 1.6 Investigating arteries and veins Student A1.06S Questions Q1 How do the results for artery and vein compare when looking at: a % change in length on loading? b return to the original length on unloading? Q2 What are the main properties of: a elastic fibres b collagen?
This activity has two parts. In part A students stretch blood vessels (a piece of artery and a piece of vein) and measure how elastic they are. In part B they look at the histology of the blood vessels using a microscope.
elastic fibres Carry blood from heart Gas / material exchange Carry blood to heart Arteries have thick walls and narrow lumens because they transport blood at high pressure
Learning Objectives. By the end of this section, you will be able to: Compare and contrast the three tunics that make up the walls of most blood vessels. Distinguish between elastic arteries, muscular arteries, and arterioles on the basis of structure, location, and function.
30 Οκτ 2023 · The outermost layer of the blood vessels is the tunica adventitia, also known as the tunica externa. This layer is primarily composed of type I collagen and elastic connective tissue (in arteries). This external layer is responsible for anchoring the vessels to adjacent organs.
