Zusammenfassung der Ressource
The Structure of the Heart
- Blood Vessels
- Aorta
- Connected to left ventricle
- Carries oxygenated blood to the tissues
- Vena Cava
- Connected to right atrium
- Brings deoxygenated blood to the heart from the tissue
- Pulmonary Artery
- Connected to right ventricle
- Carries deoxygenated blood to the lungs
- Pulmonary Vein
- Connected to left atrium
- Brings oxygenated blood to the heart from the lungs
- Chambers
- Atria
- Thin-walled and elastic
- Stretches as it is filled with blood
- Only has to pump blood a
short distance to the ventricles
- Ventricles
- Thick, muscular wall
- Pumps blood to the lungs
or the tissues in the body
- Right ventricle pumps blood to the lungs
- Has a thinner muscular wall than the left ventricle.
- Only pumps blood a short distance
- Left ventricle pumps blood to
the tissues in the body
- Has a thicker muscular wall than the right ventricle
- Needs to create enough pressure
to pump blood to the extremities of
the body
- Both atria contract together and
ventricles contract together
- Valves
- Atrioventricular valves
- Left
- Bicuspid valves
- Located between left atrium and left
ventricle
- Right
- Tricuspid valves
- Located between right atrium and right
ventricle
- Semi-lunar valves
- Left
- Located between left ventricle and aorta
- Right
- Located between right ventricle and pulmonary artery