232-235 Flashcards
1
Q
Pulmonary circulation
A
The function of the right side of the heart is to pump deoxygenated blood, which has just returned from the body, to the lungs for oxygenation.
2
Q
Myocardium
A
Specialized muscle tissue (cardiac muscle) that forms the heart. Heart is considered as a double pump that is divided into right and left sides
3
Q
Systemic circulation
A
Left side of the heart is to pump oxygenated blood, which has just returned from the lungs, to the rest of the body.
4
Q
Chambers of the heart
A
- Made up of 4 chambers (2 sides).
- The upper chambers are called atria (atrium = singular), and the lower chambers are ventricles.
- Blood is received into the atria and pushed back out from the ventricles.
5
Q
Circulation of blood through the heart
A
- Vena cava
- right atrium
- tricuspid valve
- right ventricle
- pulmonary semilunar valve
- pulmonary artery
- lungs
- pulmonary vein
- left atrium
- bicuspid valve
- left ventricle
- aortic semilunar valve
- aorta
- systemic arteries
- systemic arterioles
- systemic capillaries
- systemic venuoles
- systemic veins
6
Q
Valves of the heart
A
- Tricuspid
- Mitral/bicuspid
- Aortic
- Pulmonary
7
Q
What is the SA node
A
- SA node stands for Sinoatrial node
- Located in the right atrium of the heart
- Initiates electrical signals that trigger heart contraction
- Known as the “pacemaker” of the heart
8
Q
What is the AV node
A
- AV node stands for Atrioventricular node
- Specialized tissue that transmits electrical signals from the atria to the ventricles
- Directs signals into a region that runs down the ventricular septum (tissue separating the ventricles)
9
Q
Figure 8.3 (ECG) - P wave, QRS complex, T wave
A
- P QRS T
- The P wave qrs complex and T wave represent the electrical activity of the cardiac cycle at rest.
- THe P wave is the first wave representing Atrial Depolarization
- The QRS complex represents ventricular depolarization and the T wave represents ventricular repolarization.
