Fig. 3From: Preferential epithelial expression of type-1 cannabinoid receptor (CB1R) in the developing canine embryoPhotomicrographs of the developing central nervous system focusing at the hindbrain; a low magnification of primordia of medulla oblongata (pmo) and of the pons (pp); mr indicates medullary raphe; dashed lines enclose the parasagittal area where transversal immunoreactive fibres were observed (enlarged in b). b high magnification of the square represented in a to show both longitudinal and transversal positive fibres. Scale bars are equal to 100 µm (a) and 50 µm (b)Back to article page