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Circulatory

QuestionAnswer
Describe how the structure of an artery is related to its function carry blood away from heart at high pressure -Narrow lumen surrounded by a thick wall -Middle layer contains muscle and elastin Maintains blood pressure -Outer layer contains collagen
Describe how the structure of a capillary is related to its function Material and gas exchange with cells Blood flow at low pressure -Very small diameter -Single layer of permeable cells with pores -Easy diffusion/ exchange of materials
Describe how the structure of a vein is related to its function Bring blood under low pressure into heart -Very wide lumen keeps low pressure and greater blood flow -Thin walls = Low pressure -Valves prevent blood pooling and backflow
Discuss William Harvey’s discovery of the circulation of blood -Demonstrated blood circulates the body in a closed system -Previous theory was an open system where blood seeped from one area of body to another -Heart pumps and blood vessels transport -Arteries and veins connected by capillaries in cells
State the components of blood Plasma - fluid of blood Erythrocytes - red blood cells (oxygen transport) Leukocytes - white blood cells Thrombocytes- platelets (blood clotting)
List the materials that can be transported by blood Nutrients Antibodies Carbon dioxide Hormones Oxygen Urea Heat
Describe the function of the coronary arteries carry blood for heart itself oxygen and nutrients
Discuss causes and consequences of an occlusion of the coronary arteries Plaque from cholesterol can cause an occlusion(blockage) in a coronary artery Decreases blood, nutrient, and oxygen flow Risk of heart attack increases
Describe the circulatory system of a human Human body has a double closed circulatory system: There are two sides of the heart: Right side: deoxygenated blood Left side: oxygenated blood Pathway of blood is cyclical
Explain how the heart pumps blood (talk about the chambers and valves) Vena cava Right atria Tricuspid valve Right ventricle Pulmonary valve Pulmonary artery LUNGS Pulmonary vein Left atria Bicuspid valve Left ventricle Aortic valve Aorta BODY
Describe how the heartbeat is myogenic contraction signal / impulse comes from the heart muscle itself generates its own contractions
Outline the control of the heartbeat for 1 cardiac cycle idk bruh
Explain how the heartbeat rate is controlled as the body goes from rest to hard exercise At rest, heart - steady rhythm. Exercise increases, rate increases. Sympathetic nerves send noradrenaline increasing rate. Adrenaline (adrenal glands) increases heart rate. Exercise ends, rate decreases. Parasympathetic nerves send acetyl decreasing rate.
Created by: luciepike
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