What's the difference between sperm and spermatheca?
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.
Spermatheca
Definition:
(n.) A small sac connected with the female reproductive organs of insects and many other invertebrates, serving to receive and retain the spermatozoa.
Example Sentences:
(1) Females of Ambystoma possess sperm storage glands, the spermathecae, as well as ventral glands and dorsal glands, both of uncertain function.
(2) In the spermatheca of the female of I. burhini were found spermatids with long tails.
(3) Initial stages in plug formation commenced in the spermatheca of the adult female where two polar papillae became delimited from the remainder of the oocyte cytoplasm.
(4) During sperm storage in the spermatheca, only the carbohydrates decline steeply.
(5) In each of two Tanzanian localities harbouring sympatric populations of A and B an overlap of 20% was observed between the frequency distributions of spermatheca diameter in this pair of species.
(6) After oviposition, however, spermathecae are void as in the virgin female.
(7) The enhancer seems to suppress the lozenge phenotype with regard to the length of the antenna but otherwise there is no effect of the modifiers with regard to antennae, tarsal claws, spermathecae or female reproductive capacity (the number of eggs oviposited or the number of adult progeny ensuring from females tested).
(8) Sperm stored in the spermatheca probably is pumped onto the micropyle of the egg during this pause.
(9) It is concluded that with these East African populations of the A. gambiae complex, the measurement of spermatheca size has little value for distinguishing between individual females of the different sibling species.
(10) The seminal receptacle or spermatheca of Portunus sanguinolentus consists of two parts--an anterior glandular and a posterior chitinous part.
(11) The high levels of radioactivity, observed in the testes of males treated with 14C-labelled EMS through feeding of adults (10% sugar), in spermathecae of females mated to these males and in resultant F1 eggs, suggest that a major portion of the label reaching the testes was associated with the sperm itself rather than with other parts of the testes or the seminal fluid.
(12) The motility of sperm was examined in vivo in the vas deferens, the spermatophore, and the spermatheca of the red-spotted newt and in in vitro preparations with variations in osmolality, hydrogen ion concentration, and concentrations of specific osmolytes.
(13) The spermathecae of Eurycea cirrigera are exocrine glands in the cloaca that secrete a substance that bathes sperm stored in the lumen after mating and prior to oviposition.
(14) Neither dead newt sperm nor live rabbit sperm entered the spermatheca.
(15) Sperm were motile within the spermatophore, but little or no evidence of motility was seen in the spermatheca or the vas deferens.
(16) A study was undertaken to interpret the nature and function of the "plug like formation" observed inside the spermathecae of many phlebotomine sandflies dissected during field surveys.
(17) arabiensis males, is here shown to be sufficiently sensitive to deduce the species identity of inseminated females from the identity of the sperm contained within the spermatheca.
(18) Thus, during the complete gonotrophic cycle the spermathecae display five different forms: a) normal and void; b) showing MP; c) distended and yellowish, MP absent; d) active sperms present; e) normal and void.
(19) The cuticle of the spermatheca itself is mostly inner epicuticle with two thin underlying lamellae of procuticle.
(20) Follows a period of 3-4 days in which the spermathecae acquire different form from that of the virgin spermathecae, but sperms are still undistinguishable.