The Work of the kidneys

United States, 1940

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Episode of Series “Biology program. Unit 4. Physiology”.
The film opens with an analogy between the kidneys and the selective processes by which they eliminate waste from the body, and the machines which select various devices. Laboratory experiments show the properties of semi-permeable membranes which function in the kidneys and allow wastes to pass but restrict the passage of food materials. Content analysis charts demonstrate the difference between glomerular fluid and urine. Factors affecting the rate of urine formation, such as blood sugar content and external factors are also examined.

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production company

Encyclopaedia Britannica Films

ERPI Classroom Films



Production places
United States
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Appears in

Biology program. Unit 4. Physiology

Group of items

Biology program. Unit 4. Physiology


Collection metadata

ACMI Identifier







Black and White


16mm film; Preservation Print (Section 5)

16mm film; Limited Access Print (Section 2)

16mm film; Access Print (Section 1)

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