Temporal bones (2): sides of cranium, just above the ears. Occipital bone: at the back of the cranium. Sphenoid bone: a small bone in front of the temporal bone. Ethmoid bones (2): an even smaller bone just to the sides of the eyes. ...
bonesthat had been unearthed at several locations in southernEnglandduring the early part of the 19th century. Owen recognized that these reptiles were far different from other known reptiles of the present and the past for three reasons: they were large yet obviously terrestrial, unlike the ...
The human skeleton is the human body's internal structure. It consists of about 270 bones at birth-this number decreases by adulthood to around 206 bones after certain bones are fused together. The support the weight of the entire body and also facilitates locomotion of t...
The belly, or that part of the body between the thorax and the pelvis. Also, the cavity of the belly, which is lined by the peritoneum, and contains the stomach, bowels, and other viscera. In man, often restricted to the part between the diaphragm and the commencement of the pelvis, ...
The human hand is a picture of complexity and balance. The muscles that control the hand allow it to be strong and refined. Muscles that influence hand movement either originate on bones outside or inside the hand. Muscles that originate outside the hand are referred to as extrinsic; those ...
Spinops - This ceratopsian was named 100 years after its bones were found. Spinosaurus - This dinosaur was distinguished by the sail-like structure on its back. Spinostropheus - This theropod was once thought to be a species of Elaphrosaurus. Staurikosaurus - Another primitive theropod ...
calceolarianoun(n.) A genus of showy herbaceous or shrubby plants, brought from South America; slipperwort. It has a yellow or purple flower, often spotted or striped, the shape of which suggests its name. calvarianoun(n.) The bones of the cranium; more especially, the bones of the dome...
A group of extinct Reptilia, intermediate in structure (especially with regard to the pelvis) between reptiles and birds. paleocarida noun (n. pl.) Same as Merostomata. pentastomida noun (n. pl.) Same as Linguatulina. planarida noun (n. pl.) A division of Turbellaria; the Dendrocoela...
ornithoscelidanoun(n. pl.) A group of extinct Reptilia, intermediate in structure (especially with regard to the pelvis) between reptiles and birds. tetractinellidanoun(n. pl.) A division of Spongiae in which the spicules are siliceous and have four branches diverging at right angles. Called...
dinosaurianoun(n. pl.) An order of extinct mesozoic reptiles, mostly of large size (whence the name). Notwithstanding their size, they present birdlike characters in the skeleton, esp. in the pelvis and hind limbs. Some walked on their three-toed hind feet, thus producing the large "bird...