01:119:116 Lecture Notes - Lecture 25: Heart Valve, Circulatory System, Pulmonary Valve

• School: Rutgers University
• Department: Biological Science
• Course: 01:119:116
• Professor: D.Stern- Cardinale

Document Summary

Basics of circulatory system: c/c circulatory systems. Human heart: seq, iov human heart function. Blood vessels: c/c types of vessels, seq blood flow. Lymphatic system: seq, iov lymphatic system, c/c lymphatic and blood systems. Some organisms lack circulatory systems (cid:314) usually simple organisms (cnidarians, etc) All circulatory systems need: (1) circulatory fluid (2) vessels for fluid to travel (3) heart to pump fluid. 2 types (cid:314) figure 42. 3 (1) open circulatory system (cid:314) fluid = hemolymph: interstitial fluid (all throughout body; no differentiation) Heart contractions: hemolymph (cid:314) pushed through vessels (cid:314) interconnected sinuses. Heart relaxations: draw hemolymph back to heart. Fairly low pressure and low efficiency, but low e. Arthropods and most molluscs (2) closed circulatory system. Blood (cid:314) circulatory fluid confined to vessels. Higher pressure and more efficient, but requires more e. Not very efficient (cid:314) figure 42. 4 + 42. 10. 1 atrium (transports blood) + 1 ventricle (pumps deoxygenated blood) (cid:314) low metabolic rate in fish.