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Mechanisms of venous return NARRATED animation1970-01-01T00:00:00+00:00Pressure gradient, skeletal muscle pump, gravity, and respiratory pump PT214Shttps://d38zjy0x98992m.cloudfront.net/674e2423-a3f9-48ed-9ab4-879859d0d96a/venous_return_xlarge.jpghttps://d38zjy0x98992m.cloudfront.net/674e2423-a3f9-48ed-9ab4-879859d0d96a/venous_return_mp4_hd_video.mp4