What's the difference between germarium and sperm?
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.
Sperm
Definition:
(n.) The male fecundating fluid; semen. See Semen.
(n.) Spermaceti.
Example Sentences:
(1) A study revealed that the percentage of active sperm in semen 30 seconds after ejaculation was 10.3% when a nonoxynol 9 latex condom was used as opposed to 55.9% in a nonspermicidal condom.
(2) Here we report that sperm from psr males fertilizes eggs, but that the paternal chromosomes are subsequently condensed into a chromatin mass before the first mitotic division of the egg and do not participate in further divisions.
(3) Sperm specimens were obtained from 13 men participating in our in vitro fertilization program.
(4) Whether hen's egg yolk can be used as a sperm motility stimulant in the treatment of such conditions as asthenospermia and oligospermia is subjected for further study.
(5) Sperm were examined at 4.5 h, 8 to 9 h, and 24 to 25 h of incubation (37 degrees C, 5% CO2, and 95% air).
(6) Since the advance and return of sperm inside the tubes could facilitate the interaction of sperm with secretions participating in its maturation, the persistent infertility after vasectomy could be related to the contractile alteration that follows the excessive tubal distention.
(7) Peaks in the sperm index were preceded by 6 days with peaks in the serum testosterone concentration.
(8) Those without sperm, or with cloudy fluid, will require vasoepididymostomy under general or epidural anesthesia, which takes 4-6 hr.
(9) A sperm whale myoglobin gene containing multiple unique restriction sites has been constructed in pUC 18 by sequential assembly of chemically synthesized oligonucleotide fragments.
(10) Major limitations of the conventional sperm penetration assay are the inability to assess several aspects of sperm function (zona binding and penetration) and the absence of human ovulatory products known to influence fertilization.
(11) Couples applying to in vitro fertilization were admitted into this project when the sperm concentration was greater than 20 million per mL and motility greater than 30 per cent.
(12) To develop a new immunobead binding test (IBT) procedure that will detect sperm antibody in cervical mucus (CM), especially in very small samples of mucus.
(13) This procedure can quickly provide acrosome-reacted bull sperm for use with various in vitro fertilization procedures and for assessment of male fertility.
(14) Males were then sacrificed and organ weights, testicular spermatid counts, and cauda epididymal sperm count and sperm morphology were obtained.
(15) The freezing procedure increased sperm motility in approximately 30% of samples from both animals.
(16) The time of sperm penetration in the mouse eggs, however, was delayed for one-half to one hour when ejaculated sperm were used.
(17) The epididymis appeared distended but without any visible sperms.
(18) Liposomes of PC10 rapidly destroyed sperm motility while PC12 acrosome-reacted sperm remained motile for several h. Liposomes of PC with greater than or equal to 14-carbon fatty acyl chains had no effect on the AR or motility of sperm.
(19) Additionally, the data demonstrate that hamster sperm can remain viable for several hours after becoming immotile, and that many of the immotile sperm are capable of being reactivated.
(20) Heterogeneity in thiol content of sperm within individual samples was also observed.