Discovery Stations Cardiovascular System Already Graded A+

Discovery Stations Cardiovascular System Already Graded A+ The three main components of the cardiovascular system ️heart, blood vessels, and blood Define blood flow, blood pressure, and resistance ️Blood flow: the volume of blood flowing through a blood vessel, organ, or the entire circulation system Blood pressure: the force per unit area exerted on a vessel wall by blood inside of it (mmHg). Resistance: the opp. to flow; the measure of the amount of friction blood encounters as it passes through the blood vessels. Blood will travel from areas of ________________ to areas of _______________. ️Blood will travel from areas of high pressure to areas of low pressure. What two factors will increase blood flow? ️resistance and pressure List the three factors that affect blood flow's resistance and explain how you think each one has an effect. ️Blood's viscosity, the length of a given blood vessel, and the diameter of the blood vessels = the lower resistance, the greater the blood flow All blood vessels begin and end at the ️heart differeniate b/t arteries and veins ️Arteries carry blood away from the heart, veins towards the heart Where are capillary beds located? ️All the tissues How does the structure of capillaries dictate its critical function? ️They have the thinnest walls in order to maximize the exchange of materials What key role do the venous valves play? Where in our bodies do they play the biggest role and why does this make sure? ️Venous valves prevents blood from flowing backward in the veins. They're in the limbs where gravity opposes the upward flow of blood. Summarize the location of the heart in the human body ️In the middle of the body, sits behind the sternum. When the national anthem is sung or the pledge of allegiance is said, it is customary to place a hand over the heart. What is not completely anatomically accurate about where we are taught to place our hand? Where should we place our hand, based on where the heart is actually located? ️We should put our hand under our left breast. Explain the roles of the pericardium and pericardial cavity in the function of the heart. ️Pericardium protect the heart and anchors it the surrounding structures Pericardial cavity: the membrane that contains serious fluid for the heart to contract. Which layer of the heart is responsible for the contraction of the heart that give us a heartbeat and allow the heart to function as a pump? What type of tissue do you think this layer must be composed of? ️Myocardium, muscle tissue How does your heart utilize pressure gradients to circulate your blood? ️Your heart is designed as a pump-light pressure pushes O2 ]-rich blood of the heart, vice versa Why would the ventricles need thicker walls for contraction than the atria? ️They have higher pressure in order to push blood out the heart and to the rest of the body Differentiate between the roles of the superior vena cava and inferior vena cava ️Superior vena cava: receives blood above diaphragm Inferior vena cava: receives blood below diaphragm Differentiate between the roles of the pulmonary trunk and aorta. ️the pulmonary trunk: sends to lungs aorta: disperse to the body Differentiate b/t the roles of the atrioventricular and semilunar valves ️atrioventricular: prevent blood flowing back into atria semilunar: prevent blood flowing back into ventricles