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This week in 206 I. Physiology of the Crayfish II. Human cardiovascular physiology Animal respiration and circulation. What is respiration? Animal respiration and circulation. What is respiration? Glucose + O2 Breathing. CO2 + H2O + E Gills or lungs Circulatory system O2 Outside Air or water O2 CO2 CO2 O2 CO O2 + Glucose 2 O2 CO2 O2 CO2 Membrane(s) O2 21% CO2 <1% Tissues Organs CO2 + H2O + E Membrane(s) Circulatory systems Open Arthropods/crustacea Crayfish Blood pumped out to tissues, dumped in sinuses Tissues ~bathed Comes back to heart Through sinuses and Reenters through ostia Low pressure-low resistance High volume vs. Closed Vertebrates human Blood pumped in pipes and Never touches tissues-arteries/veins Trend is to separate oxygenated From non-oxygenated blood High pressure-high resistance Low volume Respiratory systems Open circulatory system Arteries Ostia Ophthalmic- eyes Antennal- antennae, antennules, green glands Hepatic- digestive gland Heart Sinuses arteries Heart ostia Human heart 2 systems- pulmonary and systemic. Structure of blood vessels Human respiratory system Angioplasty Coronary bypass Measuring Blood Pressure Sphygmomanometer Stethoscope High pressure = systolic, blood flow stopped above this Low pressure = diastolic, flow unrestricted below this 120 mm Hg 80 mm Hg Crayfish respiration Dr. James L. Larimer UT-Austin professor 1959 - 2005 Zoology / Neurobiology Set O2 level and monitor Measure ventilation rate Bubble O2 or N2
