TRANSPORT IN MAN - Gidemy High School Biology

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What is the Lymphatic System
Gidemy High School Biology
6:29
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The Lymphatic System
Gidemy High School Biology
3:32
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Blood Types and Rh Factor Explained
Gidemy High School Biology
4:02

Open Vs, Closed Circulatory Systems - A Level Biology

85 意见· 14/02/23
Gidemy High School Biology
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⁣Blood can flow through vessels inside the body, such as arteries and veins. This type of circulation is called closed circulation. Open circulation happens when there are no vessels to contain the blood, and it flows freely through the cavities of the body.

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