Without+vertebrae
41Bird anatomy — Bird anatomy, or the physiological structure of birds bodies, shows many unique adaptations, mostly aiding flight. Birds have evolved a light skeletal system and light but powerful musculature which, along with circulatory and respiratory systems …
42Physiology of dinosaurs — Note: In this article dinosaur means non avian dinosaur, since most experts regard birds as an advanced group of dinosaurs. The physiology of dinosaurs has historically been a controversial subject, particularly thermoregulation. Recently, many… …
43regeneration — /ri jen euh ray sheuhn/, n. 1. act of regenerating; state of being regenerated. 2. Electronics. a feedback process in which energy from the output of an amplifier is fed back to the grid circuit to reinforce the input. 3. Biol. the restoration or …
44bone disease — Introduction any of the diseases or injuries that affect human bones (bone). Diseases and injuries of bones are major causes of abnormalities of the human skeletal system (skeletal system, human). Although physical injury, causing fracture,… …
45Massospondylus — Opisthokonta Massospondylus Temporal range: Early Jurassic, 200–183 Ma …
46cetacean — cetaceous, adj. /si tay sheuhn/, adj. 1. belonging to the Cetacea, an order of aquatic, chiefly marine mammals, including the whales and dolphins. n. 2. a cetacean mammal. [1830 40; < NL Cetace(a) name of the order (see CET , ACEA) + AN] * * *… …
47Osteoporosis — Classification and external resources A stooped back is often the result of osteoporosis. ICD 10 M …
48joint — /joynt/, n. 1. the place at which two things, or separate parts of one thing, are joined or united, either rigidly or in such a way as to permit motion; juncture. 2. a connection between pieces of wood, metal, or the like, often reinforced with… …
49Caudata — ▪ amphibian order Introduction also called Urodela, one of the major extant orders of the class Amphibia. It includes salamanders (salamander) and newts (newt). The relatively small and inconspicuous salamanders are important members of… …
50Velociraptor — This article is about the dinosaur. For the Kasabian album, see Velociraptor!. For other uses, see Raptor (disambiguation). Vertebrata Velociraptor Temporal range: Late Cretaceous, 75–71 Ma …
