BSCI 207 Lecture Notes - Lecture 15: Circulatory System, Hemolymph, Cephalopod
26 Jan 2016
School
Department
Course
Professor
Document Summary
Bsci207 - lecture 15 - bulk flow (circulatory system) P. p. you breathe is much lower than p. p. of nitrogen in blood forms bubbles. Pressure will decrease again in the airplane. Atmospheric pressure at altitudes below 5500m is generally safe for humans. Commercial aircraft are typically pressurized to equivalent of 2400m. But this pressure may be too low if your body is still not equilibrated. In a closed system, blood is moved around in tubes (blood vessels, capillaries). Fluid doesn"t come into direct contact with tissues. In an open system, blood comes out into open spaces and washes over tissues (comes into direct contact with tissues). Lower pressure and less resistance since fluid is not confined in tube. Don"t depend on blood a lot for moving gas. Blood is referred to as hemolymph in open systems. Closed system allows for spatial control over blood flow. Constrict and open blood vessels (in different temperatures)
