Vocabulary
The alternating expansion and relaxation of an artery wall as blood travels through an artery.
What is a pulse?
_____ are vital materials the circulatory system delivers throughout the body.
What are oxygen and glucose?
The circulatory system gets rid of _____ by passing it through cells in capillaries and carrying it to the lungs to be exhaled as a gas.
What is carbon dioxide?
These structures carry oxygen-rich blood away from the heart.
What are arteries?
Plasma carries nutrients, _____, and wastes.
What are chemical messengers?
The largest artery in the body.
What is the aorta?
True or False: Skeletal muscles help push blood along when they contract.
What is TRUE?
True or False: A coronary artery is an artery that supplies blood to the heart itself.
What is TRUE?
These structures are the four chambers of the heart.
What are the right atrium, right ventricle, left atrium, and left ventricle?
The function of _____ is to recognize disease-causing organisms and kill them
What are white blood cells?
A hollow, muscular organ that pumps blood throughout the body.
What is the heart?
The _____ of an artery expands and relaxes in response to the heart pumping.
What is the muscular middle layer?
The primary difference between vein and artery structures is _____.
What is arteries are thicker?
These chambers of the heart contain oxygen-rich blood.
What are the left atrium and left ventricle?
The _____ have a dense network of blood vessels because they are the only place where the exchange of gases occurs between the body and its environment.
What are lungs?
A tiny blood vessel where substances are exchanged between the blood and the body cells.
What is a capillary?
One of the connections between an artery’s structure and function is _____.
What is the smooth inner layer helps blood to flow freely?
The outer _____ makes the artery strong yet flexible.
What is connective tissue?
Each of the two upper chambers of the heart that receive blood that comes into the heart.
What is an atrium?
Plasma makes up about _____ of the human body's blood.
What is 55%?
The process by which molecules move from an area of higher concentration to an area of lower concentration.
What is diffusion?
The first loop of the two-loop circulatory system.
What is the heart to the lungs and back to the heart?
The second loop of the two-loop circulatory system.
What is the heart to the body and back to the heart?
These structures carry oxygen-poor blood back to the heart.
What are veins?
The further the blood travels from the heart, the less _____ it has from its source—the heart.
What is pushing force?