human bio lab quiz on the circulatory system
what is normal blood pressure?
120/80
what is high blood pressure?
140/90
what is low blood pressure?
90/60
describe the flow of blood through the heart
blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the atrium contracts, blood flows from your right atrium into your right ventricle through the open tri-cuspid valve.
describe the events that make up the cardiac cycle
contraction and relaxation make up the cardiac cycle. contraction of two atria force blood into the ventricles, which then pump blood into the pulmonary artery and the aorta.
what is the difference between systolic and diastolic blood pressure?
diastolic blood pressure is the pressure of the semi lunar valves closing; systolic is the pressure of the brachial artery opening and closing.
what creates the first heart sound? the second heart sound?
the first sound is the brachial artery opening and closing under the cuff. the second sound is the first sound fading.
what is blood pressure?
the pressure of the blood in the circulatory system.
how does the right side of the heart differ from the left side of the heart?
the right side of the heart collects oxygen-poor blood and pumps it to the lungs, while the left side of the heart collects oxygen-rich blood from the lungs and pumps it into the body.
how do the atria differ from the ventricles?
the two atria are thin-walled chambers that receive blood from the veins, while the two ventricles are thick-walled chambers that forcefully pump blood out of the heart through arteries.
