PATHOLOGY

Detailed explanation-1: -In fish, gill lamellae are used to increase the surface area in contact with the environment to maximize gas exchange (both to attain oxygen and to expel carbon dioxide) between the water and the blood. In fish gills there are two types of lamellae, primary and secondary.

Detailed explanation-2: -Gills usually consist of thin filaments of tissue, lamellae (plates), branches, or slender, tufted processes that have a highly folded surface to increase surface area. The delicate nature of the gills is possible because the surrounding water provides support.

Detailed explanation-3: -Definition: Multi-tissue structure that is the transverse vertical platelet on the gill filament, through which capillaries run. The primary gill lamellae carry numerous fine layers called secondary lamellae which are the actual regions of respiration and excretion.