PLASMASOME 



1112 



PLASMOGONY 



P.-globulin. Same as Paraglobulin, q. v. P., His- 

 togenetic, P., Lymph, the fluid part of the lymph. 

 P. of Invertebrates, that perivascular or intercellular 

 fluid of invertebrates which corresponds to the blood 

 of vertebrates. It is both respiratory and nutritive in 

 function, clots like vertebrate blood, contains fibrinogen 

 and a substance corresponding to hemoglobin, and is 

 called by Fredericq hemocyanin ; it is also in some in- 

 stances a reddish lipochrome pigment tetronerythrin . 

 P., Muscle, the fluid obtained from muscle by pressure 

 at a low temperature, 1° C. It is spontaneously coag- 

 ulable, forming fiiyosin. P., Nutritive, the portion 

 of the cell devoted to nutritive functions. P. san- 

 guinis, blood-plasma. P., Somatic. Synonym of 

 P., Histogenetic . 



Plasmasome (plaz'-mas-om) \_n7.aofia, a molded figure ; 

 aufia, body]. In biology, a protoplasmic corpuscle. 



Plasmatic (plaz-maf -ik ) [irA&Ofta, a molded figure]. 

 Same as Plasmic. P. Stain. See Plasmic Stain. 



Plasmatoparous (plas - mat - op'- ar- us) [ plasma, a 

 molded figure ; parere, to bring forth]. In biology, 

 a term applied to certain species of fungi (e.g., Pero- 

 nospora densa, Rab., and P. pygmcea, Ung. ), in which 

 the whole protoplasm escapes from the spore in a mass 

 through the opening of a papilla- like point in the 

 wall, and at once becoming globular, secretes a cellu- 

 lose membrane and subsequently germinates by the 

 emission of a short, thick germ-tube. (Bennett and 

 Murray.) 



Plasment (plaz'-ment) [nAaofta, something molded]. 

 A proprietary emollient and lubricant application made 

 from Iceland moss. 



Plasmic (plaz' '-mik) \Tt\ao}ia., a molded figure]. In 

 biology, of or pertaining to protoplasm ; formative, 

 protoplasmic. P. Stain, a pigment which colors the 

 tissue uniformly throughout, employed in microscopy 

 as a ground or counter-stain, following and in contrast 

 with a nuclear stain. Thus, after blue or green nu- 

 clear or specific stains, use benzo-purpurin (brownish 

 red), eosin (yellowish-red), erythrosin (pink), orange, 

 or acid fuchsin (orange) ; after red use picric acid 

 (yellow). See Stains, Table of, also, Stain, Nuclear 

 Stain, Specific Stain. 



Plasmin (plaz'-min) [Tr?MG/ia, a molded figure]. 

 Denis mixed un coagulated blood with a saturated 

 solution of sodic sulphate, and allowed the corpuscles 

 to subside. The salted plasma thus obtained he pre- 

 cipitated with sodic chlorid. The precipitate, when 

 washed with a saturated solution of sodic chlorid, he 

 called plasmin. Mixed with water, it coagulates 

 spontaneously, resulting in the formation of fibrin, 

 another proteid remaining in solution. According to 

 Denis' view, fibrin is produced by the splitting up of 

 plasmin into two bodies — fibrin and a soluble proteid. 

 (Landois and Stirling.) 



Plasmochyma ( plaz-mok* '-im-ah) \jr7Ao\ia, plasma; 

 Xvpa, juice]. The portions in the cytochylema rich 

 in proteids ; paraplasm ; heteroplasm ; the fluid sub- 

 stance of a cell. 



Plasmode (plaz'-mod). Same as Plasmodium. 



Plasmodiblast (plaz-mo'-dib-last). See Trophoblast. 



Plasmodieresis \plaz-mo-di-er' -es-is) \jv7acjia, plasma; 

 (haipnv, to divide in two parts]. The division of the 

 cell-body, in contradistinction to the division of the 

 cell-nucleus. 



Plasmodiocarp (plas-mo' -de-o-karp) [7r/ldcr//a,a molded 

 figure ; elfior, form ; aa/jTrdc, a fruit]. In biology, ap- 

 plied to the fructification of fungi when of irregular 

 shape. 



Plasmodiocarpous (plaz-mo-de-o-kar' 'pus) [nlao/na, a 

 molded figure ; cWoc, form; napxdc, a fruit]. Re- 

 sembling a plasmodiocarp. 



Plasmodium (plaz-mo'-de-um) \jr7M<jfia, a molded fig- 

 ure ; eldoq, form : pi. , Plasmodia] . In biology : (a ) the 

 naked, motile mass of protoplasm formed by the organic 

 fusion of two or more amebiform bodies, as in the mes- 

 odermic cells of young Spongillce, Bipinnaria, many 

 Annelida and by phagocytes in general ; (b) the col- 

 ossal ameboid organism or vegetative body (also called 

 plasmode) formed by the coalescence of peculiar 

 swarm-spores in the Myxomycetes (e. g., Fuligo var- 

 iant, or, as it is more commonly called, Aithalium 

 septicum or "flowers of tan "), or by the mere aggre- 

 gation of such swarm-spores in the Acrasiece. P. 

 malariae. Synonyms, Hamatophyllum run. 

 Hematozoon of Malaria, Laveran's Bodies, Laveran'i 

 Organisms ; a parasite found in the blood of persona 

 suffering from malaria. Many different forms have 

 been observed, which by some are held to be stages 

 in the life-history of the same organism, by others to 

 be different species. As to the nature of the parasite 

 it is generally admitted that it is a Protozoou. 

 Polimitus malarice, Danilewsky, under Parasites 

 {Animal), Table of. The development and multi- 

 plication of the organism take place within the red 

 corpuscles. Typical intermittent fever is associated 

 with large forms of the parasite, which differ some 

 what according as the fever is a tertian or quartan in- 

 termittent. In the former case the developmental 

 cycle of the organism occupies two days, in the latter 

 three. In both forms the small intracorpuscular 

 ameboid body enlarges and gradually fills the entire 

 cell, becoming pigmented at the same time. The pig- 

 ment-granules are formed from the hemoglobin of the 

 blood corpuscle. When the plasmodia have acquired a 

 certain size, the pigment-granules begin to aggregate at 

 the center of the body. At this time, in the quartan 

 form, the organism becomes radially striate, or roset- 

 shaped. The further step consists in the breaking up 

 of the organisms into a number of small spheric bodies, 

 the young plasmodia. The blood- corpuscle is de- 

 stroyed, and the small free elements enter other red 

 cells. In the tertian form the cycle is similar, hut 

 more rapid and active ; the blood-corpuscle becomes 

 decolorized much sooner ; the pigment-granules are 

 smaller, and the parasite forms from 15 to 20 new cells, 

 while in the quartan only from 6 to 12 are produced. 

 In quotidian intermittent, the organisms are small, 

 possess very active ameboid movements (that can be 

 observed within the red corpuscles), and beconn 

 mented just before each paroxysm. Then they divide 

 into spores. Peculiar crescentic bodies, endoglobular 

 and ectoglobular, have also been described. 1 hej 

 occur in acute forms, but are most constant in malarial 

 cachexia. The significance of certain flagellate bod- 

 ies has not been fully determined. The Italiai 

 writers generally believe that the various form 

 distinct species, while Laveran and others look upon 

 them as developmental variations of the sporoxap 

 As to the relation of the parasite to malaria, thi 

 dence of its being an etiologic one is very strong 

 constant presence of the organisms, the fact of th 

 causing rapid destruction of the red corpuscles, th 

 disappearance coincidently with the symptoms on th 

 administration of quinin, and the successful inoculaM 

 of the disease from man to man, are points strati 

 in favor of their etiologic relation to the disi 

 organism has not yet been cultivated artificially oittsic 

 of the body. P., Small, a variety 01 

 in remittent and pernicious forms of malaria. 



Plasmogen (plaz'-mo-jen) [n'/.daua, a molded I 

 yevi/q, producing]. In biology, germ-plasm, tru< 

 toplasm, bioplasm, anabolic perfection in plasma. 



Plasmogony (plaz-mog'-o-ne) [n7.aafia, a m 



