The Cardiovascular System Flashcards
What is the Cardiorespiratory System?
system of body comprised of cardiovascular and respiratory systems
What is the purpose of the cardiorespiratory system?
to provide the body with adequate oxygen and remove wastes like co2.
What is the Cardiovascular system?
system of the body composed of heart, blood, and blood vessels
The Heart lies anteriorly to the sternum. T or F.
False. It likes posteriorly to the sternum and anteriorly to the spine
What is the space of the chest called between the lungs that contains all internal organs nd what does it excluded
the Mediatstinum and it excludes the lungs
How much does a typical heart weigh?
300g
What is a cardiac muscle similar to and what do they contain?
similar to skeletal muscle and they contain myofibrils and sarcomeres.
What is the function of an intercalated disc?
holds muscle cells together during contraction to create an electrical connection between the cells for the hearts contraction.
Average resting heart rate is ____
70-80bpm
What is the Sinotrial Node?
area of cardiac tissue in the right atrium which initiates the electrical impulse to determine heart rates; termed the pacemaker of the heart
Atrioventricular Node?
Specialized cardiac fibers located in the wall of the right atrium of the heart that receives heart beat impulses from SA Node and directs them to the walls of the ventricles
Where is the SA Node located?
the Right Atrium
____ seperates the two atriums
Interatrial septum
_____ seperates the two ventricles
interventricular septum
The Pulmonic side of the heart is the right or left side? Why?
Right side because it receives blood low in oxygen, pumps blood to lungs, and back to the left atria.
The Systemic side of the heart is the left or right side of the heart? Why?
Left side because it pumps blood high in oxygen to the rest of the body
Does the right ventricle operate under high or lower pressure and why?
Low Pressure because it pumps to the heart
Does the left ventricle operate under high or low pressure and why?
High Pressure because it pumps to the rest of the body.
Amount of Blood pumped out of the heart with each contraction is referred to ____
stroke volume
What is the formula for Stroke Volume?
EDV - ESV
What are the 3 support mechanisms of blood?
Transportation (oxygen, waste, heat and Hormones), Regulation (heat), Protection (clotting and Immune cells)
What are the main types of blood vessels?
Arteries, Veins, and Capillaries
What are Capillaries?
Smallest blood vessel and site of exchange of chemicals and water between the blood and tissue
How does a Cardiac Muscle differ from a skeletal muscle tissue
Intercalated Discs
