Cytophore

Author: gmbh

August undefined, 2024

http://www.ichacha.net/fayin/%E8%A2%AB%E5%AF%84%E7%94%9F%E7%BB%86%E8%83%9E.html WebMar 2, 2013 · The cytophore was formed by a progressive accumulation of cytoplasm and organells during the first spermatogonial divisions.[17] summarized the functions of the cytophore as the following: 1)synchronization of germ cell development; 2) production of energy through the large number of mitochondria present; 3) selective intake of material …

Microscopic analysis of spermatogenesis and mature ... - Springer

http://article.sapub.org/10.5923.j.zoology.20130302.01.html WebJan 1, 2024 · In segmented worms that have a saddle (i.e. clitellate annelids – Clitellata), both male and female cysts have a central and anuclear mass of cytoplasm (a cytoplasmic core, the so-called cytophore) to which, as a rule, each germ cell is connected by one IB ( Jamieson, 1981; Davis and Roberts, 1983; Ferraguti, 1983, Ferraguti, 2000; Świątek et … palmir francisco dias

The Ovary of Tubifex tubifex (Clitellata, Naididae

WebAssocited with the formation of the male sex cells from the time they leave the testes until the spermatozoön becomes fully grown there is a protoplasmic structure, termed the … WebJun 28, 2024 · In all analyzed stages of spermatogenesis, i.e., from spermatogonia to late spermatids, each germ cell is connected to a central, cytoplasmic mass called a cytophore via one intercellular bridge; thus, the germ cells are united into syncytial cysts (Figs. 1b, c, 3a, c, d, f, 7c, and 8a–e; summarized in Fig. 2 ). WebPacey & M. G. Bentley to a central mass of cytoplasm called the cytophore. The precise function of the cytophore remains unknown, although it has been described in a number of polychaete families including the Terebellidae (Eckelbarger, 1975; Smith, 1989) and in the Opheliidae (Ochi et al., 1977). palmi resort

Spermatogenesis in the earthwormMicrochaetus pentheri …

Germ-line cysts organisation in clitellate annelids - Wiley Online …

WebApr 17, 2024 · The cytophore is a small, roughly spherical cytoplasmic mass that is devoid of nuclei and each germ cell is connected to it by one ring canal (RC) (Figures 1 (a), 1 (c), 2 (a), and 4 (a)). WebJan 1, 2024 · Simirarly, in the cytophore, there was a substantial drop in the mitochondrial activity between the cysts with isodiametic speramtids when there were no detected … palmiro cornettaWebFeb 12, 2009 · During early stages of spermiogenesis the spermatids form ovoid lumps with a relatively broad connection to the cytophore. The cytoplasm of both spermatids and cytophore contains many cisternae of smooth endoplasmic reticulum and are rich in ribosomes, while mitochondria are absent in the cytophore (Fig. 2b, c). The early … エクセル vba cstr

"Webone cytophore with associated dividing presumptive spermatogonia, lying free in the lumen of the testicular tubule, was examined with TEM (Fig. 6). An exact count of the number of dividing cells was not possible from serial sections, but at … " - Cytophore

Cytophore

Analysis of the cytoskeleton organization and its possible …

WebNov 1, 2024 · The cytophore interconnecting these undifferentiated germ cells was still poorly developed; it mainly contained mitochondria (not shown). In sexually mature leeches during breeding season, two morphologically distinct categories of germ cells occurred within this part of the cord (cells interpreted as nurse cells and oocytes; Figs. 1 E, F, 2 A, … WebApr 12, 2016 · The cytophore enlarges in the subsequent stages of spermatogenesis, e.g., the volume of the cytophore that interconnects the secondary spermatocytes increased …

Did you know?

WebDownload scientific diagram Diagram of distribution of mitochondria in the nurse cell and cytophore that were selected and reconstructed in 3D, in relation to the ring canal. from …

WebDec 20, 2016 · The male germ cysts in an earthworm D. veneta. Spermatids (sp) are clustered around the cytophore (cy). Each germ cell is connected to the cytophore via … Web154918 (urn:lsid:marinespecies.org:taxname:154918) Classification. Biota; Animalia (Kingdom); Annelida (Phylum); Polychaeta (Class); Sedentaria (Subclass ...

WebAssocited with the formation of the male sex cells from the time they leave the testes until the spermatozoön becomes fully grown there is a protoplasmic structure, termed the blastophore (Bloomfield, '80, Calkins, '95) in Lumbricus, and the cytophore (Voigt, '85) in Branchiobdella varians. WebThe cytophore is surrounded by a mass of unidentified cells and spermatozoa. The scattered dark cells seen in both testes are probably spermatogonia. 1000. FIG. 5. Early formation of the cytophore. The cells still retain their individual characteristics, but early fusion near the center of the mass (C) can be seen.

WebMay 22, 2015 · The cytophore in the T. tubifex cyst extends along the long axis of the ovary in the form of elongated and branched cytoplasmic strands. Rhodamine …

WebSpermatogenesis inMicrochaetus pentheri (Microchaetidae) follows the familiar pattern known for other oligochaetes. Spermatogenic stages develop around an anucleate cytophore from which they separate as mature spermatozoa. During spermiogenesis the nucleus elongates and becomes surmounted by a complex, elongate acrosome; the … palmi ristoranteWebNov 29, 2024 · They are inconspicuous and composed of several (10–12) spherical germ-line cysts loosely interconnected by flattened somatic cells. The cysts usually comprise … palmiro fisioterapeutahttp://www.sapub.org/global/showpaperpdf.aspx?doi=10.5923/j.zoology.20120245.02 エクセル vba csv utf-8Web广东省第二人民医院. 被引频次. 487. 成果数. 60. h指数. 13. g指数. 21. palmiro bruschi gelatoWebA branched cytophore (stars) extends along the long axis of the ovary in the cyst; the cytophore is thin and inconspicuous in zones I and II, while it is more voluminous and branched in zone... palmiro fantiWebtroch·o·phore. (trŏk′ə-fôr′) n. The small, free-swimming, ciliated aquatic larva of various invertebrates, including certain mollusks and annelids. [Greek trokhos, wheel (from … エクセル vba csv作成WebThe cytoplasm is clearly differentiated into an outer clear, dense ectoplasm or cortex and an inner, fluid-like endoplasm or medulla. The cortex is further divided into an outer … palmiro cosentino