Circulatory System- The Heart Flashcards
What is the double circulatory system?
A system made up of two circuits: one for the lungs and one for the rest of the body.
The first circuit carries deoxygenated blood to the lungs, while the second circuit pumps oxygenated blood to the rest of the body.
What are the main components of the circulatory system?
The heart, blood vessels, and blood.
These components work together to circulate blood throughout the body.
What does the right ventricle do?
Pumps deoxygenated blood to the lungs.
This is part of the first circuit of the double circulatory system.
What does the left ventricle do?
Pumps oxygenated blood around all the other organs of the body.
This is part of the second circuit of the double circulatory system.
How does the heart ensure blood flows in the right direction?
Through valves that prevent backflow.
These valves are crucial for maintaining proper circulation.
Name the four chambers of the heart.
- Right atrium
- Right ventricle
- Left atrium
- Left ventricle
Each chamber plays a specific role in the circulation of blood.
What is the function of the coronary arteries?
Supply oxygenated blood to the heart.
These arteries branch off the aorta and surround the heart.
What role does the pacemaker play in the heart?
Controls the resting heart rate by producing electric impulses.
These impulses cause surrounding muscle cells to contract.
What is an artificial pacemaker?
A device implanted under the skin to control heartbeat.
It produces an electric current to maintain a regular heartbeat when natural pacemaker cells fail.
Fill in the blank: The heart contracts to pump blood around the _______.
Body.
This contraction is essential for maintaining blood circulation.
True or False: The atria contract before the ventricles.
True.
The sequence of contraction is crucial for effective blood flow.
What happens to blood after it flows into the ventricles?
It is forced into the pulmonary artery and the aorta.
This occurs during the contraction of the ventricles.
What is the primary muscle tissue in the heart?
Cardiac muscle tissue.
This specialized tissue allows the heart to function as a pump.
