Ch. 7.8 Circulatory System Key Terms
aortic valve
This is located between the left ventricle and the aorta.
circulatory system
It's also known as the cardiovascular system, and is often referred to as the transportation system of the body.
left atrium
This receives oxygenated blood from the lungs.
pericardium
This is a double layered membrane, or sac that covers the outside of the heart.
septum
This is a muscular wall that separates the heart into a right side and a left side.
arrhythmias
These are abnormal heart rhythms and can range from mild to life threatening.
diastole
The right and the left side of the heart take a brief period of rest.
left ventricle
This receives blood from the left atrium and pumps the blood into the aorta for transport to the body cells.
plasma
It is approximately 90 percent water with many dissolve or suspended substances
systole
This is when diastole is followed by a period of contraction.
arteries
They carry blood away from the heart
endocardium
This is the smooth layer of cells that lines the inside of the heart and is continuous with the inside of the blood vessel.
leukocytes
White blood cells which are not as numerous as eukaryotes. They are formed in the bone marrow and usually live around 3-9 days, Their main function is to fight infection.
pulmonary valve
This is located between the right ventricle and the pulmonary artery
thrombocytes
These are also called platelets, and are usually describes as fragments or pieces of cells because they lack nuclei and vary in shape and size.
blood
Flows through the circulatory system and is often called a tissue because it contains many types of cells.
erythrocytes
Red blood cells, which are produced in the red bone marrow at a rate of one million per minute.
mitral valve
This is located in the left atrium and the left ventricle.
right atrium
This receives blood as it returns from the body cells
tricuspid valve
This is located between the right atrium and the right ventricle.
capillaries
They connect arterioles with venules
hemoglobin
This is a complex protein composed of the protein molecule called goblin and an iron molecule called heme.
myocardium
This is the muscular middle layer.
right ventricle
This receives blood from the right atrium and pumps blood into the pulmonary artery.
veins
These carry blood back into the heart.