CHILD DEVELOPMENT PEDAGOGY

Detailed explanation-1: -While bony fishes have one gill opening on each side of its body, sharks have five to seven. The gills of bony fishes are also hidden behind flaps that open and close, whereas sharks have exposed gill slits.

Detailed explanation-2: -Gills allow fish to take in oxygen from the surrounding water and eliminate carbon dioxide from the blood. Sharks can have up to seven external gill openings, but most species have five. Gill arches are considered part of the skeleton; they hold the gills in place.

Detailed explanation-3: -Are sharks fish? Sharks are fish. They live in water, and use their gills to filter oxygen from the water. Sharks are a special type of fish known because their body is made out of cartilage instead of bones like other fish.

Detailed explanation-4: -Gill slits are individual openings to gills, i.e., multiple gill arches, which lack a single outer cover. Such gills are characteristic of cartilaginous fish such as sharks and rays, as well as deep-branching vertebrates such as lampreys.

Detailed explanation-5: -Like most fishes, sharks gill slits are located on its external surface on both lateral sides near the head. Inside the gill slits, are long projection-like structures called gill filaments.