منابع مشابه
Basic Avian Anatomy
Introduction Everyone is familiar with the anatomy of mammals and may also have some knowledge of a few avian anatomical characteristics. The purpose of this discussion is to provide a deeper insight into avian anatomy and provide some comparisons to mammalian features. An understanding of avian anatomy is essential for avian practitioners. Sources of information for this discussion include the...
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To analyse the morphogenic events during skin appendage formation, it is important to have an animal model that offers distinct patterns at various stages of development and is accessible to analysis using state of the art technology. The avian integument is such a model. Combining experimental embryologic approaches, organ cultures, and gene transduction technology, we are now able to begin to...
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FORMATION OF THE AVIAN GONADS AND REPRODUCTIVE ANATOMY The avian gonads arise from more than one embryonic source. The medulla or core arises from the mesonephric ducts. The outer cortex arises from a thickening of peritoneum along the root of the dorsal mesentery within the primitive gonadal ridge. Mesodermal germ cells that arise from yolk-sac endoderm migrate into this gonadal ridge, forming...
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The vertebrate integument represents an evolutionary compromise between the needs for mechanical protection and those of sensing the environment and regulating the exchange of materials and energy. Fibrous keratins evolved as a means of strengthening the integument while simultaneously providing a structural support for lipids, which comprise the principal barrier to cutaneous water efflux in t...
متن کاملAbdominal integument atrophy after operative procedures
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ژورنال
عنوان ژورنال: Bird-Banding
سال: 1974
ISSN: 0006-3630
DOI: 10.2307/4512004