Circulatory System

Circulatory System

1. An organ system that transports nutrients and molecules using connective tissue

2. Major Structures

   • Heart
     • The "pump"
     • Moves blood from ventricles at high pressure
     • Collects blood in atria
     • Chambers of Heart (S)
       • Atria (S)
         • Left Atrium
       • Ventricles (S)
   • Blood Vessels (S)
     • Types of Blood Vessels (S)
       • Arteries
         • Thicker musculature
         • Has no valves
         • Includes arterioles
       • Veins
         • Has valves
         • Thinner walls
         • Includes venues
   • Blood (S)
     • Plasma
     • Proteins
     • Erythrocytes
       • Metabolically active enucleated cells
       • AKA RBCs
       • Produces lactate anaerobically
     • Platelets
     • WBCs

3. Accessory Structures

   • Lymph Vessels

4. Types of Circulatory Circuits

   • Pulmonary Circuit
     • Transports blood to and from lungs
   • Systemic Circuit
     • Transports blood to and from tissues excluding lungs