Fig. 6
From: Salmonid fish: model organisms to study cardiovascular morphogenesis in conjoined twins?
Gill anatomy. a: Normal control, with part of a gill filament (b); and numerous slender gill lamellae (a). b: Part of a gill structure from the smaller twin, with barely recognizable gill lamellae (a); surrounded by extensive hyperplastic epithelium (b). Here, a regular array of cartilage spicules is included (c). c: An irregular collection of cartilage spicules (c); surrounded by hyperplastic epithelium (b). Gill lamellae are not identifiable here. Bar is 50 μm in all pictures