MCDB 1B Lecture Notes - Lecture 4: Carbonic Anhydrase, Lymphatic Vessel, Atherosclerosis
6 Mar 2018
School
Department
Course
Professor
Document Summary
Heart disease accounts for ~600000 death per year in the u. s. Transport materials, respiratory gases, hormones, metabolic products, cell etc. throughout the body. Extracellular fluid (hemolymph) of arthropods percolates through tissues and enters the heart through openings called ostia. In mollusks, a system of vessels drains the intercellular spaces and returns hemolymph to the heart. In annelids, muscular hearts pump blood through a system of closed vessels. Sites of exchange of materials between blood and interstitial fluid. Specialized cells and large molecules can be kept within the blood vessels. Fishes have a heart with two chambers: a single atrium and a single atrium and a single ventricle. Reptilian ventricle is partly divided by a septum to direct oxygenated blood to the body and deoxygenated blood to the lungs. Their pulmonary and systemic circuits are totally separate. Deoxygenated blood flows to gas exchange organs (gills or lungs), oxygenated blood flow to the rest of the body (systemic)
