What's the difference between mesothorax and thorax?
Mesothorax
Definition:
(n.) The middle segment of the thorax in insects. See Illust. of Coleoptera.
Example Sentences:
(1) In the weakest allele only part of the mesothorax is deleted.
(2) Contrabithorax (Cbx) alleles are dominant mutations in the Ultrabithorax (Ubx) gene of Drosophila that cause its ectopic expression in the mesothorax.
(3) If the ftz gene is prevented from functioning, alternating portions of the body normally derived from the active stripes fail to develop, resulting in larvae which lack the denticle bands normally formed by the mesothorax and odd-numbered abdominal segments (that is, thoracic segment T2 and abdominal segments A1, A3, A5 and A7).
(4) Contrabithorax, a mutant of the bithorax system in Drosophila melanogaster produces a partial homeotic transformation of mesothorax (wing) into methathorax (haltere).
(5) The absence of Antp+ function during embryogenesis results in the larval mesothorax exhibiting characteristics of the prothorax and an ensuing lethality; the loss of Antp+ function in the development of the adult thorax causes specific portions of the leg, wing and humeral imaginal discs to develop abnormally.
(6) The projection of the large companiform sensilla branch profusely along the ventromedial tract and more sensory fibers cross the midline in the mesothorax.
(7) Likewise, eye discs transformed to dorsal mesothorax by eyopt transdetermined to leg structures, also extremely frequently (90%).
(8) To investigate further these intrinsic properties and also extrinsic factors involved in guiding axon growth and determining synaptic connectivity, pieces of epidermis from the head were transplanted to the posterior head, prothorax, or mesothorax.
(9) It has been shown previously that in Polycomb lethal embryos posterior transformations require the normal function of the BX-C. We show here that anterior transformations of the mesothorax and other segments require the normal function of the Sex combs reduced (Scr) locus, also necessary for the normal development of the prothorax and some head segments.
(10) Phenocopies of the bithorax mutation which transforms metathorax to mesothorax were observed.
(11) Finally, we asked whether the ppx transformation, which results from early lack of Ubx+ function in the mesothorax and is seen in abx animals, is due to ectopic Scr expression.
(12) The aorta of Sympetrum danae possesses two dorsal diverticula: one in the mesothorax and one in the metathorax.
(13) Differential staining of two identified synaptically coupled neurones, a motoneurone and an interneurone, in the mesothorax of Locusta is presented as an illustration for the possible localisation of contact sites at the light-microscopic level.
(14) The mesothorax of Polycomb lethal embryos often shows posterior transformations of the anterior- and posterior-most portions of the segment, and anterior transformations of the medial portion.
(15) After 12 days of culture in vivo, antenna discs transformed to ventral mesothorax by AntpNs or AntpZ, transdetermined to notum and wing structures four to five times more frequently than the corresponding wild-type antenna discs.
(16) This interaction takes the form of an enhancement of the homeotic bx phenotype to a more extreme form-i.e., the metathorax is transformed into mesothorax in varying degrees depending on the bx allele used.
Thorax
Definition:
(n.) The part of the trunk between the neck and the abdomen, containing that part of the body cavity the walls of which are supported by the dorsal vertebrae, the ribs, and the sternum, and which the heart and lungs are situated; the chest.
(n.) The middle region of the body of an insect, or that region which bears the legs and wings. It is composed of three united somites, each of which is composed of several distinct parts. See Illust. in Appendix. and Illust. of Coleoptera.
(n.) The second, or middle, region of the body of a crustacean, arachnid, or other articulate animal. In the case of decapod Crustacea, some writers include under the term thorax only the three segments bearing the maxillipeds; others include also the five segments bearing the legs. See Illust. in Appendix.
(n.) A breastplate, cuirass, or corselet; especially, the breastplate worn by the ancient Greeks.
Example Sentences:
(1) In April 1986, magnetic resonance imaging (MRI) of the thorax and shoulder girdle was presented to the 99th Annual Meeting of the American Association of Anatomists.
(2) We measured the steady-state volumes of distribution for radioactive chloride, sucrose, and albumin in the lung of six anesthetized, spen-thorax sheep.
(3) ELS (or accessory lungs) is a rare congenital abnormality defined as a lung segment outside a normal lung, usually localized in the left lower thorax.
(4) Respiratory failure, developing 7-9 days after inoculation, was associated with a decrease in lung-thorax compliance determined during artificial ventilation, and an increase in the amount of protein including the specific antibody in lung lavage fluid.
(5) It imitates the conventional percussion massage of the thorax by introducing high-frequency gas oscillations (300 impulses per minute) into the tracheobronchial system.
(6) Radiographs of the thorax were evaluated in 240 patients during the acute phase following a myocardial infarct.
(7) Their medical histories were consulted and further measures were taken such as a radiological thorax study, total IgE, TDI, MDI and HDI RAST, a basal spirometric study and finally a provocation test.
(8) Differential and sucrose gradient centrifugation of honey bee thoraces, disrupted by gentle methods and using mannitol-triethanolamine-EDTA buffer at pH 6.5, showed that in the honey bee thorax 92-94.8% of the trehalase was mitochondrial.
(9) In comparison with untreated controls from the same litters, there was a 4-7-fold enhancement of lung-thorax compliance in all groups of surfactant-treated animals during a 3-h period of artificial ventilation.
(10) The effect of manual percussion of the thorax in nine patients with stable chronic airflow obstruction and excessive tracheobronchial secretion has been studied.
(11) The lesion has occurred in many sites, but is commonest in the thorax (60%), abdomen (11%), neck (14%), and axilla (4%).
(12) The autonomous-visceral pathology observed in cases of cervical injuries can be attributed to the direct effect of the trauma upon the segmental innervation appratus of the heart, diaphragm, thorax.
(13) Patients with massive symptoms and signs indicating abdominal injury should receive high priority in the treatment of the multiple injury patient, second only to injuries to airways and thorax.
(14) Whole iic nerves of the rostral thorax (T2-T5) usually discharged during neural inspiration, whereas those of the caudal thorax (T7-T11) were primarily active during neural expiration.
(15) The following advantages must be pointed out in respect of using DLR in thoracic diagnosis in the intensive-care ward: No faulty exposures; the thorax can be x-rayed with the patient recumbent in bed, with lateral take: the image brightness in maintained at a constant level by histogram selection; electronic image processing and storage.
(16) Heart rate (HR), mean arterial blood pressure (MAP), pulmonary capillary wedge pressure (PCWP), cardiac output (CO), cardiac index (CI), systemic vascular resistance (SVR), and arteriovenous oxygen content difference (C[a-v]O2) were measured or calculated each time the surgeon's hand entered the thorax to dissect the esophagus.
(17) In both these cases of blunt injury to the thorax, careful examination of the patients resulted in early diagnosis and surgery.
(18) HRCT scans at the apex of the thorax in all nine patients scanned at this level showed that extrapleural fat with interspersed vessels accounted for most of the plain radiographic opacity.
(19) A radiograph of the thorax showed features of peribronchitis and infiltration in both lungs.
(20) The ultrasonic diagnosis as a method of recognising postoperative subprosthetical breast pathological changes (respectively of simulated tumor recidivs and implanted breast prosthesis) located near the thorax and therefore difficult to detect by external palpation and mammography examination have been described in a follow-up study, and further possibilities of application suggested.