NEET PG DENTAL EXAM

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: -The gills take oxygen from the water and let water whisk away carbon dioxide and ammonia from the blood vessels in the gills. Gill filaments are the red, fleshy part of the gills; they take oxygen into the blood. Each filament has thousands of fine branches (lamellae) that are exposed to the water.