By Linda M. Ernst MD, MHS (auth.), Linda M. Ernst, Eduardo D. Ruchelli, Dale S. Huff (eds.)
This ebook serves as a finished atlas of the developmental histology of the foremost organs from 15 weeks gestation to the neonatal interval. each one part contains textual content on easy embryologic tactics that impact the improvement of every organ and spotlight significant histologic gains that correspond with definite developmental sessions. furthermore, there are lots of colour photomicrographs at key developmental levels to help the reader in deciding upon applicable histologic adjustments at each one developmental level. This publication may be of significant price to scholars of embryology, pathology citizens and fellows, and attending pathologists who practice fetal autopsies.
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Extra resources for Color Atlas of Fetal and Neonatal Histology
Note the features of a muscular artery including intima, internal elastic lamina, media, and adventitia. Even at this gestational age, focal intimal thickening is present. ) 16 Color Atlas of Fetal and Neonatal Histology Figure 1-23. Ductus arteriosus after birth. The ductus arteriosus of a term infant who lived for 6 days is shown. Note the features of closure of the ductus arteriosus including A, increased thickness of the intima with formation of intimal cushions; B, fragmentation of the internal elastic lamina; and C, increased connective tissue in the intima.
The histology of the mucosa of each segment is unique to that segment and specific for the function of that segment. The muscularis mucosae, submucosa, muscularis propria, and subserosa or adventitia vary little from segment to segment. The mucosa is composed of the epithelium and the lamina propria. The epithelium lies on a basement membrane. In the esophagus it is nonkeratinizing stratified squamous epithelium. In the stomach it is simple columnar mucous-producing surface epithelium with gastric pits, which give rise to simple mucous cardiac and pyloric glands, as well as serous gastric glands or crypts.
This ventral foregut diverticulum develops within a mass of mesenchyme and forms the primary lung bud by 4 2/7 weeks postfertilization age (PFA) [4–6]. The primary lung bud bifurcates laterally to form right and left primary bronchial buds at about 4 4/7 weeks PFA and subsequently begins to branch asymmetrically, forming lobar buds (three right and two left) at 5 1/7 weeks PFA, segmental buds at 5 6/7 weeks PFA, and subsegmental buds at 6 2/7 weeks PFA [1,4,5]. These sequential endodermal buds carry with them coats of mesenchyme.