Figure 2. The atrioventricular junction in ectotherms is not interrupted by an insulating plane.Picro-sirius red stain for collagen (red) on 10 µm sections of hearts of adult ectotherms showing the atrioventricular canal to be in full communication (+) with the ventricle. l(r)a, left(right) atrium.
Image published in: Jensen B et al. (2012)
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