Zusammenfassung der Ressource
Heart
- Four chambers
- Right side
- Deoxygenated blood
- Vena Cava
- Right atrium
- Tricuspid valves
- Right ventricle
- Semilunar valves
- Pulmonary artery
- Left side
- Oxygenated blood
- Pulmonary vein
- Left atrium
- Bicuspid valves
- Left ventricle
- Semilunar valves
- Aorta
- Features
- In ventricles there are TENDINOUS CORDS
- Attach to valves and walls to prevent valves inside out - backflow of blood
- Ventricular septum
- Separates the ventricles
- Deoxygenated / oxygenates separate
- Valves
- Are pocket tissues
- Fill with blood and close
- Blood pressure
- Thin atria walls, blood only goes to ventricles
- Left ventricle thickest
- Pump to whole body
- Right ventricle thickish
- Only going to lungs which is close
- Fine capillaries in lungs burst under high pressure
- The cycle
- Sino-atrial nodes
- Atria walls
- atrio ventricular nodes
- purkyne tissue
- Ventricle walls
- Diastole
- Atrial systole
- Ventricular systole
- Ventricles contract - blood forced into arteries.
- Atria contract - blood forced into ventricles, AV valves close
- Relaxed - blood flow into ventricles