Different Types of Circulatory Systems

Different Types of Circulatory Systems - Examples)...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
AP Biology Different Types of Circulatory Systems - The Survey of different types of circulation 1) Primitive levels of organisms (Sponges, Cnidarians, Flatworms…) – simple diffusion through the simple wall. 2) After primitive levels of organisms, the organisms have either closed circulatory system or open circulatory system. a) Open circulatory system: The fluid of the body (hemolymph) is ductless. Gas exchange does not occur through the fluid. Advantage – low pressure (therefore saves energy in the body.), no capillaries (easy circulation, therefore). Examples) Arthropods (Insects), Mollusca… b) Closed circulatory system: The fluid of the body (blood) is in the duct. Gas exchange occurs through the fluid – hemoglobin. Advantage - quick rate of gas exchange since the pressure is high.
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Examples) Amphibians, Annelids, mammals, Mollusk (Squid, octopus) … 3) Heart was developed as time went on (evolution.) a) Heart consists of atrium and ventricle. b) Atrium – the part that receives the blood. c) Ventricle – the part that sends the blood. d) Diversity of Heart Structure Fish: 1 atrium + 1 ventricles – 2 chambers Amphibian: 2 atria + 1 ventricle – 3 chambers Reptiles: 2 atrium + 2 ventricles (But, no separation) – 4 chambers Oxygenated blood can be mixed with non-oxygenated blood. Mammals, Birds: 2 atrium + 2 ventricles (But, separation) – 4 chambers The separation of oxygenated blood from non-oxygenated blood – much more effective....
View Full Document

This note was uploaded on 02/11/2012 for the course ZOOLOGY 152 taught by Professor Stephengammie during the Spring '11 term at University of Wisconsin.

Ask a homework question - tutors are online