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SCB203 CIRC
study for quiz 6
| Question | Answera |
|---|---|
| What are the blood vessels made up of | Arteries, Veins, Capallaries, arterioles and venules |
| Describe Arteries | Large, has a pulse, carries blood away from the heart under pressure |
| Describe Arterioles | Smaller than arteries, supply blood to capillaries |
| Describe Capillaries | smallest, most numerous, single layer of cells, passageway for nutrients wastes hormones, etc |
| Describe Venules | Collect blood from capillaries using skeletal muscle activity |
| Describe Veins | large vessels, return blood to heart (passive and no pressure) |
| What is the largest blood vessel? and what holds the most blood? | Veins |
| What is the percentages of blood in our body located? | 60% systemic veins and venules, 15% systemic arteries and arterioles, 8% heart, 12% pulmonary blood vessels and 5% capallaries |
| What is the average blood volume in a person? | 5000 ml |
| What are the types of Capallaries? | Continuous, Fenestrates, Sinusoids |
| What are the characteristics of Continuous Capallaries? | Cells form continuous tube, least permeable, most common |
| What are characteristics of Fenestrates Capallaries? | cells have pores or fenestrations, which help with diffusion (Allow ions, amino acides and glucose back in quickly). |
| What are Sinusoids? | irregular blood-filled spaces, confirm to the shape of surrounding tissue |
| What are vessels made up of? What are the 3 kinds? | Tissues- Tunica Interna, Tunica Media & Tunica Externa |
| What are characteristics of Tunica Interna? | lines the inside of a vessel, exposed to blood, made of simple squamous epithelium or endothermic. |
| What are the characteristics of Tunica Media? | middle layer & thickest, made of smooth muscle, collagen and elastic tissue, strengthens vessels & prevents blood pressure from rupturing them |
| What are the characteristics of Tunica Externa? | outermost layer, consists of loose connective tissue, merges with neighboring blood vessels. |
| What is the flow of the blood in the circulatory route? | heart --- arteries --- capalleries --- veins--- heart |
| What are the 2 systems in the circulatory system? | venous & arterial |
| What are the two types of blood pressure that we record? What is the peak and the minimum? | Systolic (peak) and Diastolic (minimum) |
| When does Systolic blood pressure occur? | During ventricular contraction |
| When does Diastolic blood pressure occur? | During Ventricular relaxation |
| If you take the difference between the Systolic and Diastolic blood pressure, what is this number referred to as? | Pulse pressure |
| If you take blood pressure at several intervals, what is it referred to as? | Mean arterial blood pressure |
| What is the pulse essentially in our body? | Swelling of an artery and contraction of an artery gives you a pulse, away from heart |
| In detail, how is the pulse wave formed? | Ventricular systole forces blood into the arteries, causing them to swell (semilunar valves open), then, ventricles relax Diastole and (semilunar valves close). |
| What is a contraction wave? How much mercury pressure? | Guarantees it moves away from heart, 120 mm of mercury pressure systolic |
| How much mercury pressure in a Diastolic pulse wave? | 80 mm |
| The process of contraction and relaxation for the pulse continues as long as there is what? | muscularis |
| What is Venous return? | Blod going back to the heart |
| What has no pulse? | Capillaries and Veins |
| How does blood move through the capillaries? | Capillary action and back pressure |
| How does blood move through the veins? | Skeletal muscles and venous valves |
| Do large veins have valves? | no |
| How does blood in large veins move toward the heart? | negative pressure (because they do not have any valves) |
| In essence, how does blood move back to the heart? | pressure, gravity, skeletal muscle, thoracic, cardiac suction |
| What is anastomosis | The point where 2 blood vessels merge, every joint has an anastomosis |
| What do anastomosis help with in your body? | Helps you to maintain body heat |
| What is AV (arteriovenus) anastomosis? | blood flows from an artery directly into a vein and bypasses the capallaries |
| What are the 2 kinds of veins? | Depp muscle veins- almost always in contraction and superficial veins - in the hypodermis, you can see them |
| What do valves do? | Allow blood to flow back to heart |
Created by:
watermelon25
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