Light micrograph of a vein; Vein walls are thinner than those of arteries consisting of 2 or more layers of circularly arranged smooth muscle fibers and a thick outer layer of collagen and connective tissue. Transverse section. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Biophoto Associates |
Taille de l’image : | 4244 px × 2745 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |