Key term
aortic valve
Valve that controls blood flow from the left ventricle into the aorta.
circulatory system
Body system that transports blood, oxygen, and nutrients to the cells.
left atrium
Upper left heart chamber that receives oxygen-rich blood from the lungs.
pericardium
Outer sac that surrounds and protects the heart.
septum
Wall that separates the right and left sides of the heart.
arrhythmias
Abnormal or irregular heartbeats.
diastole
The phase when the heart relaxes and fills with blood.
left ventricle`
Lower left chamber that pumps blood into the aorta.
plasma
Liquid portion of blood that carries cells and nutrients.
systole
The phase when the heart contracts and pumps blood out.
arteries
Blood vessels that carry blood away from the heart.
endocardium
Inner lining of the heart.
leukocytes
White blood cells that fight infection.
pulmonary valve
Valve between the right ventricle and pulmonary artery
thrombocytes
Platelets; cells that help with blood clotting.
blood
Fluid that carries oxygen, nutrients, wastes, and hormones through the body.
erythrocytes
Red blood cells that carry oxygen.
mitral valve
Valve between the left atrium and left ventricle.
right atrium
Upper right chamber that receives blood from the body
tricuspid valve
Valve between the right atrium and right ventricle
capillaries
Tiny blood vessels where oxygen and nutrient exchange takes place.
hemoglobin
Protein in red blood cells that binds and carries oxygen.
myocardium
Thick, muscular middle layer of the heart.
right ventricle
Lower right chamber that pumps blood to the lungs.
veins
Blood vessels that carry blood back to the heart.