Vein anatomy, animation. The blood pressure in veins is relatively low, so they rely on gravity and the squeezing force of skeletal muscle (pink, left and right) to push blood back to the heart. Veins contain one-way valves (bottom and top) to stop blood flowing in the wrong direction. | |
Licence : | Droits gérés |
Crédit : | Science Photo Library / Biocosmos / Francis Leroy & Chris Lippens |
Model Release : | Non requis |
Durée : | 30 Secondes |
Aspect ratio : | 16/9 |
Restrictions : | - |