Essential Components & Functions
Blood:
- Composition:
- RBCs (oxygen transport)
- WBCs (immunity)
- Platelets (clotting)
- Plasma (transport medium)
Heart Structure:
- Four chambers
- Valves (bicuspid, tricuspid)
- Cardiac muscle
- Conducting system:
- SA node (pacemaker)
- AV node
- Bundle of His
- Purkinje fibers
Circulation Types:
- Pulmonary (heart ↔ lungs)
- Systemic (heart ↔ body)
- Portal (special circulation)