. The American journal of anatomy. not well differentiated (compare Mall, 02, and chapter on 26 The Development of the Lungs organogenesis). In the upper part of the gut just below the gillpouches, the mesoderm, covered by coelomic epithelium forms slightasymmetrical projections into the coelom (Fig. 1 c), while at the level ofpulmonary swelling, the anlage of the mesodermic portion of the lungwings (Fig. 2) takes the form of two irregular lateral projections intothe coelomic cavity. The one on the right is much larger than that onthe left (Fig. 2), so much so that at this stage the latter is
. The American journal of anatomy. not well differentiated (compare Mall, 02, and chapter on 26 The Development of the Lungs organogenesis). In the upper part of the gut just below the gillpouches, the mesoderm, covered by coelomic epithelium forms slightasymmetrical projections into the coelom (Fig. 1 c), while at the level ofpulmonary swelling, the anlage of the mesodermic portion of the lungwings (Fig. 2) takes the form of two irregular lateral projections intothe coelomic cavity. The one on the right is much larger than that onthe left (Fig. 2), so much so that at this stage the latter is only faintlyshown. This results in a marked asymmetry of the primitive lung wingsthemselves. The mesoderm in the two wings is characterized by the rich-ness of its cellular content, as the portion behind the intestine alreadyshows a differentiation preceding the stages of chondrification of the prim-itive vertebrae. The mesoblastic anlage of the lungs arises from thegeneral mesoderm of the head gut. Just below the pulmonary anlage.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectanatomy, bookyear1901
