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48
Mail vil se, at Dr. Lindahls Beskrivelse af
Coeneii-chyniets Struktur afviger sæsentligt fra Resultatet af vore
Undersøgelser i den Ketniiig. Hvor han har fundet
fibril-lært Bindevæv med en Mængde Tvermuskler, have vi
iagttaget hyalint Bindevæv, rist paa Saftkanaler og gjenneindraget
af Tverkanaler i alle Retninger, forsynede med Bpithel men
uden Muskelfibre; og hvor lian angiver, at Væggens ydre
Halvdel bestaar af hyalint Bindevæv med stjemeforinige
Korpnskler, der have vi fundet et udpræget fibrillært
Bindevævslag, forsynet med spindelforniige Bindevævslegemer.
Vi tor antage, at Dr. Lindahl ikke har havt de fornødne
Hjælpemidler, hvorved man er istand til med Sikkerhed at
skjelne de forskjellige Væv fra hverandre, og at det er
Grunden til, at hans Fremstilling er blevell mindre korrekt.
Forresten ser det næsten ud. som om han liar beskrevet
sit Tversnit af "Skaftväggen" omvendt; thi sikkert er det,
at, fibrillært Bindevæv kun findes paa den ydre Flade, hvor
han har hyalint Bindevæv, og at dette derimod findes
overalt indad, hvor ban har fibrillært Bindevæv. Kun
Længde-muskler findes i Stokkens Coenenchyni og disse alene i
Længdekanalerne.
Polypkroppen er udvendig beklædt med et temmelig
tykt Epithel (Ectoderm), der bestaar af tiere Lag polyædriske
Celler, fuldkommen lig dem, der findes paa Coenenchymets
ydre Y;eg. og som tidligere ere beskrevne. — kuli skulle vi
bemærke, at en stor Del af disse Ectodermceller ere
forsynede med rigt. brunt Pigineutindhold, der giver Polypen
sin Farve. Fig. -ti’, il. 43, a. Imellem Epithelcellorne og
nedsænket i Ectodermet gjenfinde vi de samme encellede
Slimkjertler, som vi for have omtalt. — og de ere i lige
stor Mængde tilstede her som paa Stokken, kun ligge de
enkeltvis overalt; Grupper af dem træffes ikke her, Fig. 42, i.
Indenfor Ectodermet er et meget bredt forgrenet, hyalint
Bindevævslag, Fig. 4a, c, der ved sine Forlængelser indad
danner et Net med større eller mindre Masker, som udgjør
Kanalsystemet, bestaaende af Længdekanaler, Fig. 42. tf.
og Tverkanaler, Fig. 43, e, beklædte med Epithel, dannet af
aflange Celler med Kjerne og Protoplasmaindhold. Disse
Epithelceller ligge temmeligt langt fra hverandre, Fig. 43, /;
kun i de trange Kanaler ligge de aldeles tæt sammen. I
dette Bindevæv iagttages foruden Bindevævslegemer ogsaa
yderst fine Punkter, der sandsynligvis ere Aabninger for
Ernæringskanaler, og paa dets indre Væg er et tyndt Lag
Længdemuskler, Fig. 42, ff, indenfor hvilket iagttages det
tykke Lag af stærke, transverselle Muskler, Fig. 43, h, som
beklædes af Epithel, dannet af flere Lag runde Celler med
Kjerne og Protoplasmaindhold. Cellerne ere 0,011— og
Kjernen omtrent 0,002.....Tab. X. Fig. 40. a.
It will be seen. that Dr. Liudahl’s description of the
structure of the sarcosoma, differs, materially, from the
result of our researches in this direction. Where lie lias
found fibrinous connective-tissue with a multitude of
transverse muscles, we have observed, hyaloid connective-tissue
rich in secretory ducts, and penetrated by transverse canals
in all directions, furnished with epithelium, but without
muscular fibres; and. where, he states, that the exterior
half of the wall, consists of hyaloid connective-tissue with
stellate corpuscles, we have found, a prominent layer of
tibrillous connective-tissue, furnished with spindle-formed
corpuscles of connective-tissue. We venture to suppose,
that Dr. Lindahl has not had the necessary assistance at
bis disposal, to place him in a position to distinguish
with certainty, the various tissues from each other, and
that, that is the reason his representation is not quite
correct. Indeed, it would almost appear, as if lie had
described the sectional aspect of the wall of the shaft,
reversed, because, it is quite certain, that fibrillous
connective-tissue is only found on the exterior surface, where,
he describes hyaloid connective-tissue as present, and. that
it. on the other hand, is found everywhere, interiorly, where
lie has observed tibrillous connective-tissue. Only
longitudinal muscles are found in the sarcosoma of the sfalk.
and these only, in the longitudinal canals.
The body of the polyp is, exteriorly, covered with a
rather thick epithelium IEctoderm), consisting of several
layers of polyhedrons cells, exactly like those found on the
outer wall ol’ the sarcosoma, and which have previously
been described. We would, only, remark here, that a large
portion of these ectoderm cells is furnished with rich
brown-tinged contents, which imparts the colour to the
polyp (fig. 42, «, 43, a). Between the epithelium cells,
and depressed in the ectoderm, we again find the same
single-celled mucous glands which we have previously
described, and they are present, here, in as great abundance
as on the stalk, only, they are everywhere placed singly;
groups of them, are not met with ill this situation (fig.
42, b). Inside of the ectoderm, there is a very broad,
ramifying layer of hyaloid connective-tissue (tig. 42, c),
which, by it’s prolongations inwards, forms a reticulation,
with larger or smaller meshes, and forms the ductiferous
system, consisting of longitudinal canals (fig. 42, tf), and
transversal canals {fig. 42, e), covered with epithelium
formed of oblong cells containing a nucleus and protoplasm
contents. These epithelium-cells are placed, pretty far
apart from each other (fig. 42. /), aud, only, iu the
narrow canals do they lie perfectly close together. In this
connective tissue, may be observed, besides the connective
tissue corpuscles, also, extremely minute points, which
probably, are openings for nutrient ducts; and on it’s inner
wall, there is a thin layer of longitudinal muscles (fig.
42, ff), inside which, is observed, the thick layer of strong
transversal muscles (fig. 42. h), that is covered with
epithelium, formed of several layers of round cells
containing a nucleus and protoplasm contents. The cells are
0,011"" ill width, and the nucleus is about 0.0(12"" broad
(Pl. -X, fig. 4(i. a).
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