Heart Flashcards
Describe the mammalian heart
Dual chambered
Left heart pumps oxygenated blood
Right heart pumps deoxygenated blood
Prevents mixture of oxygenated & deoxygenated blood
Arteries go away from heart
Veins return to heart
Define systole & diastole
Systole = contraction
Diastole = relaxation
What is ventricular systole
Ventricular systole = contraction of ventricles
Results in cardiac output
Atrioventricular valves close
Source of lub sound
What is ventricular diastole
Ventricular diastole = relaxation of ventricles
Results in ventricular filling
Semi-lunar valves close
Source of dub sound
Label the diagram
Label the diagram
Label the heart
Label the heart
Label the valves
Label the diagram
describe blood flow through the heart
- Deoxygenated blood from body returns to right atrium via superior & inferior vena cava
- Blood flows through tricuspid valve into right ventricle
- Contraction of right ventricle forces blood through pulmonary valve into pulmonary artery
- Pulmonary artery carries deoxygenated blood from heart to lungs where it is oxidised
- Oxygenated blood returns to left atria via pulmonary vein
- Blood flow through mitral valve into left ventricle
- Left ventricle contracts forcing blood through aortic valve & into aorta
- Aorta carries blood from heart to rest of body
Fill in the heart table
Fill in the table
Intercalated discs transmit electrical impulses
