gill arch
41Meckel's cartilage — Head and neck of a human embryo eighteen weeks old, with Meckel’s cartilage and hyoid bar exposed …
42eel — eellike, adj. eely, adj. /eel/, n., pl. (esp. collectively) eel, (esp. referring to two or more kinds or species) eels. 1. any of numerous elongated, snakelike marine or freshwater fishes of the order Apodes, having no ventral fins. 2. any of… …
43Pseudobranch — The pseudobranch, also pseudobranchia is the reduced first gill arch of a fish (on the inner surface of the opercle, near the junction of the preopercle).In teleost fish, the pseudobranchs are mostly without respiratory function, and in… …
44Puerto Hondo Stream Salamander — Taxobox name = Puerto Hondo Stream Salamander status = EN | status system = IUCN3.1 trend = down status ref = IUCN2006|assessors=Shaffer et al |year=2004|id=59066|title=Ambystoma ordinarium|downloaded=11 May 2006 Database entry includes a range… …
45Skeleton — The skeleton is composed of bones and is the framework of the body. * * * 1. The bony framework of the body in vertebrates (endoskeleton) or the hard outer envelope of insects (exoskeleton or dermoskeleton). 2. All the dry parts remaining after… …
46Lungfish — For the band, see Lungfish (band). Lungfishes Temporal range: Early Devonian–Recent …
47Malabar trevally — Scientific classification Kingdom: Animalia Phylum …
48Fish anatomy — The anatomy of fish is primarily governed by the physical characteristics of water, which is much denser than air, holds a relatively small amount of dissolved oxygen, and absorbs light more than air does. Body (1) operculum (gill cover), (2)… …
49Acanthodii — Taxobox name = Acanthodii fossil range = Early Silurian to Permian image width = 250px image caption = Acanthodes bronni regnum = Animalia phylum = Chordata subphylum = Vertebrata infraphylum = Gnathostomata classis = Acanthodii subdivision ranks …
50Yellowtail trumpeter — Scientific classification Kingdom: Animalia Phylum …
