01:119:116 Lecture Notes - Lecture 24: Connective Tissue, Edema, Sinoatrial Node

• School: Rutgers University
• Department: Biological Science
• Course: 01:119:116
• Professor: Professor Beal

Document Summary

A. what is a circulatory system used for: why do you need one, carry oxygen and get rid of co2, carries gasses and nutrients. B. some animals do not have a circulatory system: cnidaria: diploblastic, gastrovascular, planarians -> flatworms: gastrovascular cavity that is highly-branched, triploblasts, bilateral, aceolomates, flattened, nematodes: interstitial fluid in pseudocoelom, pseudocoelomates, triploblasts. C. problem: diffusion slow over large distances -> circulatory system. A. 3 basic components: fluid, humans: blood, interconnecting vessels, humans: veins and arteries, muscular pump, example: heart. Arteries: away from heart, heart -> organs, arteries -> arterioles (smaller versions of arteries), in organs -> capillaries, 2. ) Capillaries: microscopic blood vessels in tissues, capillary bed- network of capillaries that infiltrate all tissues, exchange between blood and tissue, merge into venules, 3. ) C. heart: heart- pumping organ with 2 or more muscular chambers, atria (singular: atrium)- receive blood from veins, ventricles- pump blood to arteries, pericardium- connective tissue sac that encloses heart. Iv. comparison of circulation patterns (important: figure 42. 4 and figure 42. 5)