Upgraded B002 Ntbi0304 Anatomy Shark Placoid Scales — a labelled NEET Biology diagram with a definitions lexicon.
Anatomy of a shark showing placoid scales and external gill slits. Labelled parts: Chondrichthyes, Placoid Scales, Bone Tissue, Gill Slits, Gills, Style, Theca, Carcharodon megalodon, Sharks. A class of fish characterized by a cartilaginous endoskeleton, persistent notochord, and lack of an operculum. FYI: These fish, like sharks, possess placoid scales which are structurally similar to teeth. Tough, tooth-like scales found on cartilaginous fish (e.g., sharks). A hard, mineralized connective tissue composed of osteocytes and a matrix rich in calcium salts and collagen fibers. FYI: It acts as the primary reservoir for calcium and phosphorus in the human body. Individual openings to the gills found in the pharyngeal region of chordates, used for respiration and filter feeding. FYI: In cartilaginous fish, gill slits are separate and exposed, whereas in bony fish, they are covered by a bony flap called the operculum. Thin, folded structures found in the respiratory system of aquatic organisms, such as fish and bivalves, used for gas exchange. FYI: In fish, the gills are housed within the operculum and are crucial for maintaining the necessary oxygen levels in aquatic environments. The style is the stalk connecting the stigma to the ovary. It serves as a pathway for pollen grains to reach the ovules. FYI: The style is often the part that grows longer to facilitate the movement of pollen towards the stigma. Armored cellulose plates found on the cell wall of Dinoflagellates. Carcharodon megalodon is a labeled feature or concept in this upgraded BioAtlas image: A labeled lateral view of a shark (e.g., Carcharodon megalodon style), clearly labeling the cartilaginous skeleton, placoid scales, and 5-7 visible gill slits. Sharks is a labeled feature or concept in this upgraded BioAtlas image: A labeled lateral view of a shark (e.g., Carcharodon megalodon style), clearly labeling the cartilaginous skeleton, placoid scales, and 5-7 visible gill slits.