This program takes a close look at the organs of the human circulatory system and how they work to sustain life. After an introductory overview, the composition of blood-its plasma, erythrocytes, leukocytes, and platelets-is analyzed, blood types and Rh factor are considered, the role of hemoglobin in transporting oxygen is explained, and the anatomy and function of the heart is examined. Factors that affect blood pressure and circulation are also discussed, along with the circulatory demands of exercise.

Encoded with permission for digital streaming by Infobase on Aug. 20, 2009. Learn360 is distributed by Infobase for Films for the Humanities & Sciences, Cambridge Educational, Meridian Education, and Shopware. Teacher's guide available under Additional info tag.

Circulatory System: Overview (2:25) -- Composition of Blood (2:30) -- Oxygen Transport & Hemoglobin (2:50) -- Anatomy of the Circulatory System (2:16) -- How the Heart Works (1:11) -- Blood Pressure (3:21) -- Blood Pressure at Capillary Level (2:33) -- Circulatory Response to Exercise (1:12).