. Cunningham's Text-book of anatomy. Anatomy. 30 HUMAN EMBEYOLOGY. After the separation of the scleratogenous segments of the mesodermal somites, the remainders of the somites, each of which consists of a flat plate with incurved dorsal and ventral margins, constitute the muscle plates from which the striped muscle fibres are derived. In the opinion of some observers the outermost portion of each of the above-described plates is developed into subcutaneous connective tissue cells; consequently it is spoken of as the cutis lamella. Accordiug to this view the muscle cells are formed from their i
. Cunningham's Text-book of anatomy. Anatomy. 30 HUMAN EMBEYOLOGY. After the separation of the scleratogenous segments of the mesodermal somites, the remainders of the somites, each of which consists of a flat plate with incurved dorsal and ventral margins, constitute the muscle plates from which the striped muscle fibres are derived. In the opinion of some observers the outermost portion of each of the above-described plates is developed into subcutaneous connective tissue cells; consequently it is spoken of as the cutis lamella. Accordiug to this view the muscle cells are formed from their innermost cells and the incurved margins of the plates. The Intermediate Cell Tracts.—The intermediate cell tracts are the rudiments of the internal organs of the genital system and the temporary and permanent urinary system, with the exception of the urinary bladder and the urethra. The Lateral Plates.—From the cells of the lateral plates are formed the lining endothelial cells of the great serous cavities of the body—the pleurae, the peri- cardium, and the peritoneum; the majority of the connective tissues, with the exception of those of the vertebral column and the head, the greater part or all the mesoderm of the limbs, and, probably, the unstriped muscle fibres of the walls of the alirnentary canal and the blood-vessels. Position of otic vesicle Xeural crest Embryonic arc. Xeuxal tube Ectoderm of amnion Mesoderm amnion Trophoblast of chorion Paraxial mesoderm Jntermediate cell tract Splanchnic and /somatic layers of lateral rjlate meso. Embryonic coelom Amnion Xeural crest Caudal neuropore. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Cunningham, D. J. (Daniel John), 1850-1909; Robinson, Arthur, b. 1862, ed. New York, W. Wood
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1914
