How did this proliferation of limbs, teeth, and vertebrae, not to mention the complexity we can infer about the overlying anatomy and physiology, arise from the simple early forms of animal life? How did DNA evolve to contain the program for such complexity?doi:10.1002/evan.1360020407...
Dental Anatomy and Tooth Morphology Dental anatomy and tooth morphology , Dental anatomy and tooth morphology P Kumar 被引量: 0发表: 2007年 Clinical anatomy of tooth hard tissue development in fetus Objective: To reveal the development of tooth hard tissue of fetus.Methods: Maxilla and mandible ...
‘plated skin’, referring to their characteristic mosaic of overlapping dermal plates that enveloped the head and trunk region (Figure 3). They possessed shark-like heterocercaltailsand in their overall anatomy were very much akin to chondrichthyans, although recent discoveries from the Late ...
51,99 Once the presence of the barrier has been confirmed both radiographically and manually, the tooth can be obturated (Fig. 6-21). View chapterExplore book Dental anatomy Padraic M. Dixon MVB, PhD, MRCVS, Nicole du Toit BVSc, MSc, PhD, MRCVS, in Equine Dentistry (Third Edition), ...
six major clades and 18 isolated lineages independently evolved multicuspid teeth from a unicuspid ancestral morphology, mostly through single-cusp addition events, for a total of 24 independent originations of complex teeth (see Fig.2and Supplementary Fig.6for the names and positions of major clad...
and make preparations that conform with the anatomy and physiology of the teeth. The thickness of the remaining dentin should also be paid attention to avoid irritation of the pulp and maintain the health of the pulp. The complete surface should be designed as much as possible in the enamel ...
Describe the anatomy, histology, and functions of the large intestine. What are the functions of the three subdivisions of the pharynx? What are the functions of the periosteum? Explain in detail how the shape or morphology of the alveolar surface and ear pinna affects its function. ...
An X-ray showing enamel and dentin replaced by an amalgam restoration(X 射线显示牙釉质和牙本质被汞合金修复体取代) 5.1 牙齿修复 大多数牙齿修复都涉及去除牙釉质。 通常,去除的目的是接近牙本质的潜在腐烂或牙髓的炎症。 这通常是汞合金修复和牙髓治疗的情况。
Nitrogen isotopes are widely used to study the trophic position of animals in modern food webs; however, their application in the fossil record is severely limited by degradation of organic material during fossilization. In this study, we show that the n
In addition to morphology, the structural composition also influences functionality. For reconstructing the evolutionary history of the African Paludomidae and to develop hypotheses on the role of trophic specialisation in their evolution, we here identified the hardness and elasticity of taenioglossan ...