American Heritage® Dictionary of the English Language, Fourth Edition
- n. A layer of embryonic cells formed in vertebrates by association of part of the mesoderm with the endoderm and developing into the wall of the viscera.
Century Dictionary and Cyclopedia
- n. The inner or visceral layer of mesoderm, formed by the splitting of the mesoblast, separated from the somatopleure by the perivisceral space, cœlomatic cavity, or cœloma. It is formed in those animals whose germ becomes four-layered in the above manner, and then constitutes the musculature and connective tissue of the intestinal tract and its annexes—the lining epithelium being derived from the hypoblast. Thus, the connective tissue and muscular substance of the lungs, liver, kidneys, etc., and the thickness of the walls of the stomach, bowels, etc., are all splanchnopleural. The term is contrasted with somatopleure.
- n. A layer of embryonic cells formed from the mesoderm and endoderm that develops into the wall of the viscera
GNU Webster's 1913
- n. (Anat.) The inner, or visceral, one of the two lamellæ into which the vertebrate blastoderm divides on either side of the notochord, and from which the walls of the enteric canal and the umbilical vesicle are developed. See somatopleure.
- Ancient Greek σπλάγχνα (splankha, "viscera") + πλευρά (pleura, "a side of something") (Wiktionary)
- New Latin splanchnopleura : splanchno-, of viscera; see splanchnology + Greek pleura, side. (American Heritage® Dictionary of the English Language, Fourth Edition)
“The lateral mesoderm splits into two layers, an outer or somatic, which becomes applied to the inner surface of the ectoderm, and with it forms the somatopleure; and an inner or splanchnic, which adheres to the entoderm, and with it forms the splanchnopleure (Fig. 16).”
“By the forward growth and flexure of the head the pericardial area and the anterior portions of the primitive aortæ are folded backward on the ventral aspect of the fore-gut, and the original relation of the somatopleure and splanchnopleure layers of the pericardial area is reversed.”
“The first rudiment of the heart appears as a pair of tubular vessels which are developed in the splanchnopleure of the pericardial area (Fig. 457).”
“The path along which they travel into the embryo is a very definite one, viz., from the yolk sac upward between the splanchnopleure and gut in the hinder portion of the embryo.”
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