PHSI 208 Study Guide - Midterm Guide: Hematology, Chyle, Fibrinolysis
Document Summary
Cv system is essential for most of the multicellular organisms. Cv function primarily as a transport system. Ex) nutrients, gases, metabolites, and heat: enhances communication. Ex) signal molecules such as hormones: establishes defense (inflammatory response, antibody-antigen interaction, homeostasis. Final mechanism for transport is the same as in unicellular organisms: ex) membrane transport and diffusion. 3 basic components in human cv system: muscular pump (heart, distribution networks (blood vessels) 1st component: muscular pump thoracic cavity, tilted to the right and in between the lungs. The heart is on the ventral side of the. Heart is enclosed by pericardium filled with fluid: for physical protection and lubrication. Cardiac tapenade: buildup of pericardial fluid within the pericardial sac causes a decrease in cardiac output. The ventricles occupy the bulk of the heart with the epicardial coronary arteries and veins running along the sulci (groove) of the heart. 4 chambered heart: 2 atria and 2 ventricles.
