Heart
Cavity in which the heart resides
Thoracic Cavity
What is the liquid portion of blood?
plasma
Sites of gas exchange
Capillaries
Where deoxygenated blood enters the heart
right atrium
What protein carries the highest portion of O2 in the blood?
Hemoglobin
Largest artery in the body
Aorta
The pacemaker of the heart, other wise known as...
Sinoatrial (SA) node
One of the 3 layers or "tunics" of blood vessels, this one's job is to help maintain blood pressure...
Tunica Media
What is the size of the heart compared to?
The size of your fist
What is the function of the cells known as leukocytes? (general function)
Immune response (fight infection)
Give a description of how the heart functions.
The heart has two sides: the right side pumps blood to the lungs, and the left side pumps oxygen-rich blood to the rest of the body.
Arteries that supply blood to the brain
Carotid Arteries
Blood vessel that carries blood from the lower body into the right atrium
Inferior vena cava
Blood vessel carrying oxygenated blood to the left atrium
pulmonary vein
True or False: The heart has its own electrical system that controls its rhythm, allowing it to beat independently from the brain.
True
Why is it important to have slow blood flow within your capillaries?
Keeps blood in capillaries longer so there is more time for diffusion
cardiac muscle cells are striated, have intercalated discs, and are highly ___________.
What are the tendons that connect the valves to the cardiac muscle to prevent backflow muscles?
chordae tendinea