What's the difference between calcareous and theca?
Calcareous
Definition:
(a.) Partaking of the nature of calcite or calcium carbonate; consisting of, or containing, calcium carbonate or carbonate of lime.
Example Sentences:
(1) The following signs in the preoperative radiographs were predictive of unfavorable outcome: small head fragment, comminution of the calcar femorale, and varus angulation of the head.
(2) To insert the new stem we had to reconstruct the proximal femur and the calcar region by autogenous cortico-cancellous bone grafts in seven cases.
(3) At present, we insist on the unexpected relationship between diabetes mellitus and undernutrition either in some major infantile forms (described in India and Nigeria) with calcareous pancreatitis, or some less severe forms observed in Africa.
(4) Middle-aged patients and men were more prone to develop resorption of the calcar.
(5) Serial sections of 90 Sprague-Dawley rat brains with the pineal in situ were scanned to determine the occurrence and regional distribution of calcareous concretions within the pineal gland and its surrounding leptomeningeal tissue.
(6) The collar of the BBM transfers stress to the calcar.
(7) The girdle epidermis of adult Mopalia muscosa secretes several types of structures, including calcareous spicules and innervated hairs.
(8) In order to define the anatomy of the calcar femorale, a radiologic and surgical study was done on ten paired cadaver femurs.
(9) Thirty-four (42 per cent) had more than three millimeters of resorption of the calcar or superomedial cyst formation.
(10) A massive decrease in stress in the region of the calcar femorale was found when the implants were in place, and it was concluded that this decrease could contribute substantially to the calcar femorale resorption sometimes observed in patients after total hip replacement.
(11) Ratios of the stem, stem tip, greater trochanter, lesser trochanter and calcar, and normal femur to the reference sacroiliac joint were obtained, as well as tip-to-stem, and stem-to-normal femur in unilateral arthroplasties.
(12) The plate tensile strain increased by 360% while the compressive calcar strain decreased 85%.
(13) Sufficient cementation of the medullary canal significantly reduced the incidence of calcar resorption, as did neutral and valgus positioning of the femoral component.
(14) Comparison of our data with those of others indicated that the incidence of loosening, calcar resorption, and cortical hypertrophy was usually lower than with similarly designed conventional high-modulus Charnley stems.
(15) X-ray diffraction showed that calcite (CaCO3) was the major crystalline constituent of the calcareous deposits.
(16) In the region of the calcar femorale, crossing trabeculae, similar to the appearance of an enchondroma or bone infarct, have been described in osteoporosis and osteoarthritis and probably represent unmasking of normally present reinforcing trabeculae.
(17) The splitting of several calcareous nodules on a valve made it more pliable.
(18) The 4 modes of failure characterizing stem-type component progressive loosening mechanisms consisted of stem pistoning within the acrylic (3.3%), cement-embedded stem pistoning with the femur (5.1%), medial midstem pivot (2.5%), calcar pivot (0.7%) and bending (fatigue) cantilever (3.3%).
(19) Calcareous corpuscles are smaller and more numerous in the scolex and neck than in the cyst wall.
(20) If this intermenstrual bleeding appears at a certain time after the insertion of the intrauterine device, either there is a calcareous deposit, or the device has shifted, or there is an infection.
Theca
Definition:
(n.) A sheath; a case; as, the theca, or cell, of an anther; the theca, or spore case, of a fungus; the theca of the spinal cord.
(n.) The chitinous cup which protects the hydranths of certain hydroids.
(n.) The more or less cuplike calicle of a coral.
(n.) The wall forming a calicle of a coral.
Example Sentences:
(1) By 24 hr, rough endoplasmic reticulum in thecal cells increased from 4.2 to 7% of cell volume, while the amount in granulosa cells increased from less than 3.5% to more than 10%; the quantity remained relatively constant in the theca but declined to prestimulation values in the granulosa layer.
(2) In the small ovarian follicles, the immunostaining for TGF-beta 1 was present in oocytes, follicle cells, and granulosa and theca cell layers.
(3) These results suggest that TGF-alpha is synthesized in the ovary, perhaps in the theca-interstitial compartment.
(4) 125I-Labelled OTA consistently labelled the ovarian stroma and the theca interna, but not the corpora lutea, the granulosa cells or the theca externa.
(5) This leads, in turn, to triple-layering of the theca interna in follicles of the 2nd resting period.
(6) The electron microscopy examinations showed that a large amount of collagen fibers scattered under the albuginea layer and interwove with cells of albuginea and theca externa.
(7) The binding sites for human follicle-stimulating hormone were found in three tumors of epithelial origin (serous cystadenoma and mucinous cystadenoma) and in two of sex cord-stromal origin (theca cell tumor and theca-granulosa cell tumor).
(8) The purpose of this study was to compare the steroidogenic potential of the granulosa, theca, and medullary tissues from polycystic and normal ovaries.
(9) Those cells such as the granulosa cells of smaller follicles, the theca interna cells, the interstitial gland cells, oocytes, peritoneal epithelial cells were entirely negative.
(10) A significant increase in thymidine per follicle occurred at 15:00 h on Days 1 and 3 of the cycle from stage 2 (bilaminar follicle) to stage 6 (7-8 layers granulosa cells plus theca).
(11) Taken together, these and previous observations reveal fundamental differences in the cellular localization and hormonal regulation of ovarian IGF gene expression in that IGF-II gene expression (unlike IGF-I) is theca-interstitial (rather than granulosa) cell-specific, and is subject to down (as opposed to up) regulation in response to estrogenic stimulation.
(12) Marked infolding of both the granulosa and theca tissue in some follicles suggested early luteinization.
(13) Cellular localization studies revealed the IGFBP-3 gene to be exclusively expressed in the theca-interstitial rather than the granulosa cell compartment.
(14) The acquisition of catecholamine responsiveness was specific to hCG; if theca-interstitial cells were induced to differentiate with either prostaglandin E2 or cholera toxin, then isoproterenol did not enhance androgen synthesis.
(15) CR was primarily localized in interstitial gland cells and in theca interna cells but was not found in corpora lutea cells in the ovary during the estrous cycle.
(16) Specific LH receptors with common binding properties were detected in both granulosa and theca layers of large preovulatory follicles.
(17) The rat perforatorium is the part of the perinuclear theca that underlies the acrosomic system.
(18) One to several layers of theca interna cells just beneath membrana granulosa did not demonstrate any immunoreactivity of 3 beta-HSD or that of cytochrome P-450 17 alpha-hydroxylase.
(19) To test the possibility that progesterone released by granulosa cells may serve as a substrate for production of androgen in theca cells, specific antiserum was used to adsorb progesterone present in the medium.
(20) Very few adrenergic nerve fibres were present in the theca interna of follicles or in the corpus luteum.