Circulatory System- The Heart Flashcards
What is the circulatory system made of?
The heart, blood vessels and blood.
What is a double circulatory system?
2 circuits joined together.
Explain 2 examples of a double circulatory system.
- The right side of the heart pumps deoxygenated blood to the lungs to get oxygen. Then they come back to the heart.
- The left side of the heart sends oxygenated blood to body cells, to give them oxygen. Then they come back to the heart.
What type of tissue are the walls of the heart?
Muscle tissue.
What structures do the blood cells flow through to get to the atria (atrium is singular)?
The vena vaca (on the right) or the pulmonary vein (on the left).
What does the atria do?
It contracts to push blood to the ventricles.
What do the ventricles do?
They contract to push blood up the aorta (on the left) and the pulmonary artery (on the right).
Generally, what structures carry blood to the heart and away from it?
To the heart: veins
Away from the heart: arteries
The heart is an organ meaning it needs it’s own oxygen supply. How does the oxygen get there?
Coronary arteries branch off the aorta and surround the heart.
Where are the cells found that control the heart rate?
The right atrium.
How do these cells control your pulse?
It produces electric pulses which communicate with the muscles.
How do artificial pacemakers work?
They are implanted below the skin and have a wire that goes to the heart. This wire produces an electric current.
