Ch. 7.8 Circulatory System Key Terms
What is aortic valve
A valve that controls blood flow from the left ventricle into the aorta.
What is circulatory system
The network of organs and vessels responsible for blood flow throughout the body.
What is left atrium
The upper left chamber of the heart, receiving oxygenated blood from the lungs.
What is pericadrium
The sac surrounding the heart, providing protection and lubrication.
What is septum
The wall dividing the left and right sides of the heart.
What is arrhythmias
Irregular heartbeats, shown as an abnormal pattern on an EKG.
What is diastole
The phase of the heartbeat when the heart muscle relaxes and the chambers fill with blood.
What is left ventricle
The lower left chamber of the heart, pumping oxygenated blood to the body.
What is plasma
The liquid component of blood, carrying cells and other substances.
What is systole
The phase of the heartbeat when the heart muscle contracts and pumps blood.
What is arteries
Blood vessels carrying blood away from the heart.
What is endocardium
The innermost layer lining the heart chambers.
White blood cells, involved in immune defense.
What is pulmonary valve
A valve that controls blood flow from the right ventricle into the pulmonary artery.
What is thrombocytes
Platelets, involved in blood clotting.
What is blood
The fluid circulating through the body, carrying oxygen and nutrients.
What is erythrocytes
Red blood cells, responsible for oxygen transport.
What is mitral valve
A valve that controls blood flow from the left atrium to the left ventricle.
What is right artium
The upper right chamber of the heart, receiving deoxygenated blood from the body.
What is tricuspid valve
A valve that controls blood flow from the right atrium to the right ventricle.
What is capillaries
Tiny blood vessels connecting arteries and veins, facilitating oxygen and nutrient exchange.
What is hemoglobin
The protein in red blood cells that carries oxygen.
What is myocardium
The muscular middle layer of the heart wall.
What is right ventricle
The lower right chamber of the heart, pumping deoxygenated blood to the lungs.
What is veins
Blood vessels carrying blood back to the heart.