What's the difference between germarium and testis?
Germarium
Definition:
(n.) An organ in which the ova are developed in certain Turbellaria.
Example Sentences:
(1) The germarium encloses mononucleate and binucleate trophocytes, prefollicular tissue and oogonia, while the vitellarium contains 2-5 oocytes arranged in order of maturity.
(2) At the time the 16 cell cluster becomes arranged in a lens-shaped layer laterally across the germarium, the centrioles lose their juxtanuclear position and move towards the oocyte.
(3) They were first observed in the distal part of the germarium where rings of four different size classes were found, differing in diameter by up to twofold.
(4) However, in all analysed hemipteran species (Lygus pratensis, Calocoris affinis, Graphosoma lineatum, Euscelis plebejus) the microfilament pattern was very different: while the nurse cells stained only weakly, we always found a characteristic (in some species massive) microfilament network surrounding the trophic core, a central area in the germarium from where material is transported through the trophic cords into the oocytes.
(5) In the germarium poly(A)+RNA was found to accumulate in the trophocyte cytoplasm concomitant with the maturation of these cells.
(6) Since the oocyte is connected to 15 nurse cells by a system of intercellular bridges or ring canals, the possibility that the cluster of centrioles arose in the germarium from an intercellular migration of centrioles from the nurse cells to the oocyte was analyzed in serial sections for the electron microscope.
(7) The heterocellular female gonad of the typhloplanoid Castrada viridis consists of a single germarium and two rows of vitellaria.
(8) According to the total combination of characters, size and colour of yellow bodies, presence and character of luminescence in the germarium and adjoining areas of vitellarium, the presence of "starvation bodies", "degeneration bodies" and resorpting oocytes, the state of seminal receptable, each group is divided into subgroups that enables us to make a detail description of age composition of the population under study.
(9) The telotrophic ovary of Epilachna vigintioctopunctata is composed of 32-40 ovarioles, each with an apical germarium and a basal vitellarium.
(10) Each of its 25-30 ovarioles is composed of a small terminal filament, a small germarium and a vitellarium consisting of the egg follicle.
(11) The paper is illustrated by photos and pictures of ovarioles from the moment of germarium formation to the beginning of vitellogenesis.
(12) In the fifth instar larva of E. integriceps, two zones may be seen in the germarium of the telotrophic ovariole: the apical trophocyte zone and the distal oocyte zone.
(13) In oogenesis, both cyclin A RNA and a shorter form of the cyclin B transcript are seen in the cells of the germarium that are undergoing mitosis.
(14) Evaluation of the number of anomalous thoracic macrochaetae in parallel strains of flies after heating of the oocytes during the critical periods of macrochaeta development (seven days before egg laying), i.e., the stage of oocyte formation in the germarium.
(15) The trophocyte nucleoli synthesize RNA still in germarium.
(16) Each primordial nucleus of this germarium develops and then forms an individual plasmic membrane.
(17) The germarium, composed of a germinative zone and a growth zone, is surrounded externally by a layer of accessory cells the function of which is hypothesized in this study.
(18) This nurse cell is formed during differential mitoses in the germarium as one of two prooocytes.
(19) During their migration through the germarium, follicle cells undergo several structural changes and, of these, the most conspicuous one occurs at the level of the nucleolus.
(20) Complete reconstruction of the synaptonemal complex in 12 pachytene (defined here as that stage in which the synaptonemal complex is continuous throughout the bivalents) nuclei from one wild-type germarium has permitted the following observations.
Testis
Definition:
(n.) A testicle.
Example Sentences:
(1) Thus, our study confirmed that male subjects with a history of testicular maldescent have an increased risk for testis cancer, although the magnitude of this risk was lower than suggested previously.
(2) The expression of the mRNA for mouse testicular lactate dehydrogenase (LDH-X) was examined by RNA:cDNA hybridization in situ in the testis and by Northern analyses of meiotic and postmeiotic spermatogenic cell populations.
(3) In contrast, Leydig cells from rat testis contain monooxygenase systems which catalyze the metabolism of PAH, such as DMBA.
(4) Testis MAPs promoted microtubule assembly, but to a lesser degree than brain MAPs.
(5) Comparison of the native and derivatized wheat germ CaMs with native bovine testis CaM indicates that the concentrations of these proteins required for half-maximal stimulation of either erythrocyte membrane Ca2+-ATPase activity or cardiac sarcoplasmic reticulum phosphorylation are very similar.
(6) In an effort to understand the regulation of the onset of testosterone formation in the human fetal testis we measured adenylate cyclase activity in response to hCG stimulation in homogenates of fetal testes obtained from first and second trimester human abortuses.
(7) Gonadoblastoma is an unusual tumor that typically arises in a streak gonad or an abnormal testis of an individual having a Y chromosome.
(8) Immune response in a patient with an in-situ seminoma of the testis was studied.
(9) We conclude that there are high levels of a GHRH-like substance in mature rat testis which is present both at the level of protein product and gene transcript.
(10) Due to low numbers of animals in Replica 1, the reduced Leydig cell volume was not significant after TCDD treatment; however, in Replica 2 there was a dose-dependent reduction (P < 0.01) in volume per testis of Leydig cell cytoplasm, nuclei, or total Leydig cell volume.
(11) The findings also raise the possibility that Prl may play a role in the regulation of testosterone synthesis by the prepubertal testis.
(12) Likewise, [3H]estradiol-receptor complexes from rabbit uterus, Squalus oviduct, or mouse testis bound minimally to Squalus testicular chromatin.
(13) The cells transferred were of three types, normal spleen cells, T cell-enriched spleen and lymph node cells from mice immunized with testis homogenate (TH) in complete Freund's adjuvant (CFA) and given an extract of Bordetella pertussis (BP) and the latter cells activated by in vitro culture with TH antigen for 48 h. Controls were given buffer alone.
(14) Testis weight was decreased to approximately 50% of control after eight weeks of treatment.
(15) There was a testy set of exchanges between the editor and Michael Ellis.
(16) A rare case of a seminoma developing in an atrophic testis is described and the role of testicular atrophy in tumorigenesis is discussed.
(17) The efficacy of combined cytostatic-surgical treatment was evaluated in a prospective study involving 70 patients with germinal tumors of the testis metastasizing into the lungs.
(18) Micrococcal nuclease-digested testis and erythrocyte chromatin was separated into soluble and insoluble fractions.
(19) Specific high affinity saturable binding proteins for oestradiol-17beta have been demonstrated in the cytoplasm of liver, adrenal, pituitary, prostate, epididymis and testis interstitial tissue of the rat.
(20) As for possible causes of reduced Leydig cell activity it was investigated whether the testis was (1) hypoplastic; (2) abnormally fused with the epididymis; (3) located in the abdomen; (4) or UT was associated with hypospadias.