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...o. 12S9 from Dr. J. R. Cottell, Louisville, Ky. X 2. The picture shows the coelom filled mostly with granular magma.

==Fig. 16. Photomicrograph of endothelial lining of umbilical cord coelom of embryo 42 mm== ...to cord “pillars” and continuous with rectus sheath. U.C. = umbilical cord coelom. L. = degenerating endothelial cells. Description in text.

==Fig. 15. Photomicrograph of section of umbilical cord coelom of embryo 42 mm== ...to cord “pillars” and continuous with rectus sheath. U.C. = umbilical cord coelom. L. = degenerating endothelial cells. Description in text.

Fig. 16. Photomicrograph of endothelial lining of umbilical cord coelom of embryo 42 mm. x circa 225. ...to cord “pillars” and continuous with rectus sheath. U.C. = umbilical cord coelom. L. = degenerating endothelial cells. Description in text.

...inar embryo showing the further development of the 3 layers and the space (coelom) that forms in the mesoderm (only the righthand side is shown, lefthand sid ...sion into somatic and {{splanchnic mesoderm}} separated by intra-embryonic coelom.

Fig. 15. Photomicrograph of section of umbilical cord coelom of embryo 42 mm. Site indicated by arrow in Fig. 14. x circa 75. Fig. 16. Photomicrograph of endothelial lining of umbilical cord coelom of embryo 42 mm. x circa 225.

...I . =intercoelomic septum. D. = distal slit-like portion of umbilical cord coelom. S. = space in umbilical cord. U. = umbilical vein.

...Horizontal lines = blood vessels. Black = mesoderm. U .C. = umbilical cord coelom. ...Horizontal lines = blood vessels. Black = mesoderm. U .C. = umbilical cord coelom.

...leural coelom; Coe, Peritoneal coelom; E.C., External Communication of the coelom: Pr, Pronephros; Ht, Projection of the heart in the pericardial cavity; X.

==Fig 201. The Form of the Coelom in a 3rd week Embryo as viewed from the right side==

...and mesothelial cord, leading from funnel (f.) to unlined space (a). Coe., coelom; h, smaller unlined space;c, endothelial cord. X circa 580. ...space, containing corpuscles. c and d, mesothelial cords (see text); Coe., coelom. X circa 800.

V, vein; Ar, artery; All, allantois cavity; Coe, coelom; Y, yolk sack ; X 22 diams.

.... Horizontal lines = blood vessel. Black = mesoderm. U.C. = umbilical cord coelom.

==Fig. 16. Showing the Origin of the Primitive Coelom, the Mesoblast and Cavity of the Amnion during the Development of the Human

==Fig. 73 Diagrammatic section of the abdominal region of the coelom==

Piece of an ovum (18x14x14 mm) showing a large clump of magma in the coelom.

...183. Diagram to show the manner in which the Ducts of Cuvier encircle the Coelom at the junction of the Pericardial and Pleural Parts (Iter venous)==

...to cord “pillars” and continuous with rectus sheath. U.C. = umbilical cord coelom. L. = degenerating endothelial cells. Description in text.

...ullary groove; v, v, veins; A, A, umbilical arteries; All, allantois; coe, coelom.

'''Fig. 3.''' Section 76, X 50. Pr, Pronephros; Coe, Coelom; Pl, Pleural Cuelom; V, Umbilical vein; Br V, Branch of umbilical vein, onl ...r tip of somite IV on opposite side) ; Coe, Coelom; E.C., Communication of coelom with exterior; Ch, Chorda.

(No. 12 of my collection). X 50. 03 third occipital myotome; coe, coelom; v, vein; st, septum transversum; l, liver; ph, pharynx; uv, umbilical vesi

...the most cranial extension. This attachment now divides the intraembryonic coelom around the trachea into two canals, the L and R pleuro (pericardio-peritone ** Canals are lined by coelomic mesothelium and are continuous with whole I-E coelom (referred to hereafter simply as coelomic canals).

...Diagram to show the development of the secondary yolk sac, extra-embryonic coelom and remnant of the primary yolk sac==

...ction across a vertebrate embryo to show the parts of the mesoderm, of the coelom==

* Coel - Coelom

...gut. Oblique line = blood vessels. Black = mesoderm. U.C. =umbilical cord coelom.

...e 3 germ cell layers and the lateral plate divided into the intraembryonic coelom and associated mesoderm developmental regions. See [[:File:Stage10 K12202-0

...e 3 germ cell layers and the lateral plate divided into the intraembryonic coelom and associated mesoderm developmental regions. See [[:File:Stage10 K12202-0

...otochord, (3) the" ingrowth of the mesoblast, and (4) the formation of the coelom.

==Comparative Development of the Coelom==

The parietal mesoderm (lying above the coelom) is not labeled.

The parietal mesoderm (lying above the coelom) is not labeled.

...All - Allantois Ch - Chorda; Ht - Heart; Coe - Coelom; P.C. — Pericardial coelom; Ca - Capillary, but no connection; Pl — Plexus of lateral aortic branche

==Fig. 4. Dorsal wall of the pericardial and upper peritoneal portions of coelom with pericardio-peritoneal passages and commencing lung buds==

* Coe., coelom

Am.c, Amniotic cavity. Coe, Coelom. Ec, Ectoderm, in B, bearing the anlages of villi. Ent, Entoderm.

...liver. small dots = gut and allantoic diverticulum. U.C. = umbilical cord coelom. Black line indicates the plane of the umbilical veins.

...nections with the mesothelium. All., allantois; bl.i.. blood-island; Coe., coelom; Ect., ectoderm of chorion; f. , funnel-shaped connections, with unconnecte

...he yolk sac surrounded on either side and ventrally by the extra-embryonic coelom.

The intestinal coils lie for the most part in the umbilical coelom. ...e and form secondary loops, all of which push their way into the umbilical coelom where they remain until the embryo reaches a length of 40 mm (compare [[Boo

C = Coelom. SV = Sinus venosus. VM = Mesocardium posterior.

The embryo lies within the coelom, and bands of -magma fibrils radiate from the amnion to the chorionic wall.

...blood vessels. Black = mesoderm. Small dots = gut. U .C. = umbilical cord coelom. Black line indicates the plane of the umbilical veins.

...doderm only; vt, vena terminals; mrs, mesoderm; sol, splanchnopleure; coe, coelom; nch, notochord; Md, medullary groove; my, myotome; Endo, endoderm; Ecto, e

...grams of cross sections at various stages to show the establishment of the coelom and mesenteries== ...all in the yolk-stalk region, results in the embryonic and extra-embryonic coelom retaining their open communication at this point for a long time after they

| 1-3 somites; coelom

'''C.''' Origin of mesoderm (black) and coelom from margin of primitive mouth, with formation of a ventral mesentery round

...he communication between the exocoelomic space around the yolk-sac and the coelom (body cavity) within the embryo. Carnegie {{CE6488}}, sequence 2, X15. 104

A. = amnion. L.T. = lateral tissue plate. U. = umbilical vein. C. = coelom. Description in text.

...cranial attachment of body stalk; between B and C is the extension of the coelom occupied by the midgut loop; D = the caudal attachment of the stalk; G.t. =

...nt at which extraembryonic body cavity passes over into intraembryonic (or coelom).

...f yolk sac; hs., parietal layer of yolk sac; hn., dermal umbilicus; lh l , coelom; lh 2 , exoccelom; m., mouth; st., yolk stalk.

...t which extraembryonic body cavity passes over into the intraembryonic (or coelom proper).

...to describe the shape of the [[Coelomic Cavity Development|intra-embryonic coelom]] within the lateral plate [[mesoderm]] that forms during week 3 of human d

A, cerebral vesicle; B, heart; 0, coelom; D, intestine; E, primitive kidney; F, limb bud; G, dorsal aorta; H, neural

A, cerebral vesicle; B, heart; 0, coelom; D, intestine; E, primitive kidney; F, limb bud; G, dorsal aorta; H, neural

...of the embryo. The large spaces on either side of the gut are those of the coelom or body-cavity of the embryo. Carnegie {{CE6344}}, section 3-7-11, X75.

The intestinal system still consists of a straight tube of the Coelom surrounding the elongated cylindrical body, heart and runs Yolk sac are rem

Through the pulmonary anlage. C = Coelom. PA = Pulmonary anlage.

...ion 910; C = section 954; interval between B and 0 is the extension of the coelom into the stalk and occupied by the midgut loop. D = section 1002 at the lev

==The coelom and its derivatives in the frog==

* '''E''' - coelom

| 6. Coelom, bounded by the somatopleure externally and splanchnopleure internally.

Note rectum, urogenital sinus, allantois and intraembryonic coelom.

Note shape of Intraembryonic coelom on L. Site of caudal attachment of connecting stalk to body wall.

...ricardial sac, pericsrdio-peritoneal passages and upper part of peritoneal coelom in 6 mm Embryo==

Showing the relations of the coelom and viscera. a, anus ; au, auricle of heart ; b, bladder (continuous with a

* Larger cavity is chorionic space (coelom).

* Larger cavity is chorionic space (coelom).

* Larger cavity is chorionic space (coelom).

...the body stalk. B =section 1200. 0 = section 1256. B-C = extension of the coelom occupied by the midgut loop. D = section 1272 at the level of the caudal at

* Larger cavity is chorionic space (coelom).

...on 972; 0 = section 1044; interval between B and 0 is the extension of the coelom occupied by the midgut loop. D = section 1052 at the level of caudal attach

...al between B and 0 is the communication between extra- and intra-embryonic coelom. D = the level of the caudal attachment of the body stalk.

...stalk; B = section 1184; 0 = section 1236; between B and 0 is extension of coelom; D = section 1252 at the level of the caudal attachment of stalk; G.t. = se

...B = section 857 ; 0 =section 913. Between B and 0 is the extension of the coelom occupied by the midgut loop. D=section 921 at the level of the caudal attac

...septum transversum, showing the dorsal wall of pericardial and peritoneal coelom with orifices of right and left pneumato-enteric recesses.

Extra-embryonic coelom

...inal tube and its appendages throughout thevertebrate kingdom absorbs. The coelom does not extend into the root zone (Fig.Gl), and not in the front section o

...ion 775; C = section 825; interval between B and C is the extension of the coelom into the stalk and occupied by mid-gut loop; D = section 875 at the level o

* Larger cavity is chorionic space (coelom).

* chorionic cavity - The fluid-filled extraembryonic coelom (cavity) formed initially from trophoblast and extraembryonic mesoderm that * '''amniotic cavity''' - The fluid-filled (amniotic fluid) extraembryonic coelom (cavity) formed initially by epiblast and then lined by ectoderm and surrou

* Larger cavity is chorionic space (coelom).

* Larger cavity is chorionic space (coelom).

* Larger cavity is chorionic space (coelom).

* Larger cavity is chorionic space (coelom).

* Larger cavity is chorionic space (coelom).

...left the bud is shown cut through an area near the distal extremity of the coelom. At the right the cut is more dorsal and extends through the tips of the lu

enveloping the embryo. Compare the situation of the coelom in this with that in the subsequent pictures. There is

...The exocoelom has been drawn into the embryo and will later unite with the coelom of the pleuroperitoneal cavity.

* Thick mesothelium lining the coelom along L edge of stomach, the primordium of the spleen and greater omentum a

Figs. 3 and 4. A, cerebral vesicle; B, heart; 0, coelom; D, intestine; E, primitive kidney; F, limb bud; G, dorsal aorta; H, neural

...mitive segment stalk, remaining narrow. On the left side of the figure the coelom of the primitive segment stalk and that of the lateral plate are separate,

* Larger cavity is chorionic space (coelom).

* Larger cavity is chorionic space (coelom).

* Larger cavity is chorionic space (coelom).

The heart and pulmonary system remained. The dorsal half shows the coelom and the two primitive kidneys (Mesonephroi). Over the anterior surface

...of the embryo. The large spaces on either side of the gut are those of the coelom or body-cavity of the embryo. Carnegie {{CE6344}}, section 3-7-11, X75.

al., Allantois; am., amnion; am. c., amniotic cavity; cce., coelom; dh., vitelline area between two dotted lines which represent the edge of t

...e and form secondary loops, all of which push their way into the umbilical coelom where they remain until the embryo reaches a length of 40 mm. (compare Figs