Summary CARDIOVASCULAR SYSTEM ANATOMY

CARDIOVASCULAR SYSTEM Introduction to CVS • CVS is a closed system is the transport system in the body • It delivers oxygen, nutrients, hormones, and other important substances to cells in the body Components 1. The heart 2. Blood vessels 3. The Blood The Heart • Heart is a hollow muscular pumping organ • Shape- Pyramidal or conical. • Measurements- Length 12 cm, Width9 cm in adults • Weight-300 g in males; 250 g in females. • Is equivalent to the size of fist. • Heart is located between the 2 lungs (the 2 pleural cavities), in the middle mediastinum and rests on the thoracic diaphragm inferiorly   Chambers of the Heart 2 Atrias Are the receiving chambers Right Atria • Receives deoxygenated blood • Communicates with RV via tricuspid valve • Are bigger with thin walls Left Atria • Receives oxygenated blood from lungs • Communicates to LV via mitral valve/bicuspid valve. • Are smaller and has thicker walls than the right atrium • NB/ Each atrium has a protruding auricle to increase their capacity and volume of blood they are able to contain.