Circulation lesson 2 vertebrate circulation systemic circulation..notebook 1 April 12, 2018 Apr 194:33 PM Aim: How is circulation in vertebrates accomplished? what are the main circulatory organs? Hw. Read pgs 948, 952 then compare and contrast systemic circulation to pulmonary circulation. Start studying for Quiz on circulation Friday 1. Go over test and hw. 2.The job of the circulatory system in vertebrates. 3. organs and the job of each one. 4. compare blood vessels function and shape Apr 178:45 AM Open Closed . Blood like fluid hemolymph in contact with organs . Hemolymph not in vessels all the time * Slower Flow No hemoglobin in hemolymph Insects and mollusks Require a Pumping heart both circulate nutrients and . Waste Fluid is blood with hemoglobin Blood always in vessels Rapid flow blood is not in contact Diffusion is between capillaries and interstitial fluid found in vertebrates and worms / with organs
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• The job of the circulatory system is to transport substances to and out of the cells throughout the body.
It delivers:
Oxygen
nutrients
Hormones
it picks up:
CO2 and
Cellular waste
Apr 196:11 PM
2. Anatomy of the C. S. The main organs are:
• The Heart. It is a muscular organ that pumps blood and fluids trough an elaborate system of vessels.
• Blood: liquid tissue that transports nutrients, waste and hormones. contains 3 different types of cells (Red, white, and platelets)and plasma (water +solutes)
• Vessels Tube like structures that distribute blood through the body include: A. Veins transport blood to the heart(contain valves and carry poorly oxygenated )B. arteries transport blood away from the heart (no valves and carry oxygenated blood )
C. capillaries narrow vessels blood flow from capillaries to venules. Capillaries allow exchange fluids between blood and interstitial fluid.