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Updated Biology Courses cardella

General Biology
Prof. Bryan Cardella, M.Ed.

ap biology eaton

AP Biology 
Dr. Carleen Eaton, M.D.

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The Circulatory System

  • Circulatory systems range from systems that rely on simple chemical diffusion up to the complex arrangement of arteries, veins and four-chambered heart of birds and mammals.

  • Animal circulatory systems perform a number of functions: they deliver oxygen and nutrients to cells, they remove waste products from cells and tissues, and they distribute heat and hormones.

  • In this Lesson we'll explore the different types of circulatory system and the components of these systems: heart, blood vessels and blood itself. We’ll also study the human heart and circulation, and end by considering the causes and effects of cardiovascular disease.