Internal anatomyExternal anatomyToothless beak and cheek teethHerbivore teethSome bipedal herbivoresAs well as the giant plant-eaters, there were several other groups of smaller herbivores,…
Making noisesEye socketsBinocular vision of modern animalsBinocular vision of the dinosaursPeripheral vision of modern animalsPeripheral vision of the dinosaursPerhaps the most difficult part of…
MUSCLE STRUCTURE MUSCLES OF THE BODY SKELETAL MUSCLE MOVEMENT FIND OUT MORE
The skeleton is covered by layers of skeletal muscle. Each muscle is attached to two or more bones so that…
(Encyclopedia) Pirogov, Nikolai IvanovichPirogov, Nikolai Ivanovichnyĭkəlīˈ ēväˈnəvĭch pĭrōgôfˈ [key], 1810–81, Russian surgeon, b. Moscow. He entered Moscow Univ. at the age of 14 and completed the…
(Encyclopedia) pyridinepyridinepĭrˈĭdēn [key] or azineazineăzˈēn [key], C5H5N, colorless, flammable, toxic liquid with a putrid odor. It melts at −42℃ and boils at 115.5℃. Chemically, it is a…
(Encyclopedia) parathyroid glandsparathyroid glandspârˌəthīˈroid [key], four small endocrine bodies, located behind the thyroid gland, that govern calcium and phosphorus metabolism. These four masses…
(Encyclopedia) PachycephalosaurusPachycephalosauruspăkˌĭsĕfˌəlōsôrˈəs [key] [Gr., = thick-headed lizard], bipedal herbivorous dinosaur of the late Cretaceous period, approximately 68–65 million years…
(Encyclopedia) needle, implement of metal or other material used to carry the thread in sewing and in various forms of needlework and manufacturing. The earliest needles were merely awls or punches.…
(Encyclopedia) growth hormone or somatotropingrowth hormonesōmătˌətrōˈpən [key], glycoprotein hormone released by the anterior pituitary gland that is necessary for normal skeletal growth in humans (…
