单词 | mesenchyme |
例句 | This consists of mesenchyme, the embryonic tissue that will become the bones, cartilages, and connective tissues of the body. Anatomy and Physiology 2013-06-19T00:00:00Z Called the mesenchyme, this tissue contains cell layers that either stretch or pinch together. Shapeshifting tissue folds into bowls, coils, and ripples 2017-12-28T05:00:00Z In this complex metamorphosis, epithelial cells — the kind that stick together in sheets to form bodily tissues — are converted into loosely organized cells called mesenchyme. Raw Data: A Tumor, the Embryo’s Evil Twin 2014-03-17T20:26:20Z Figures of early stages in vertebral development by the authors mentioned show that the basidorsals chondrify first, as neural arches, while a separate mass of mesenchyme lies externally and ventrally from these. The Ancestry of Modern Amphibia: A Review of the Evidence 2011-09-10T02:00:27.077Z In Echinodermata a certain amount of mesenchyme appears before the epithelial mesoderm, which is formed later as gut-diverticula. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. Anatomy and Physiology 2013-06-19T00:00:00Z Large lymphoid cells are early seen among those of the mesenchyme, but whether these migrate from the coelomic epithelium, or are originally mesenchymal is doubtful, though the former seems more probable. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" 2010-12-26T03:00:17.840Z They distinguished in the middle layer two quite distinct elements, the mesoblast proper, formed by the evagination of the walls of the archenteron, and the mesenchyme, formed by free cells budded off from the germ-layers. Form and Function A Contribution to the History of Animal Morphology At the same time, mesenchyme within the limb bud begins to differentiate into hyaline cartilage, forming models for future bones. Anatomy and Physiology 2013-06-19T00:00:00Z In the Vertebrata the whole of the mesoderm has at first the mesenchyme form. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z Also during the sixth week of development, mesenchyme within the limb buds begins to differentiate into hyaline cartilage that will form models of the future limb bones. Anatomy and Physiology 2013-06-19T00:00:00Z The network of the spleen seems certainly to be derived from cells of the mesenchyme which lose their nuclei. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" 2010-12-26T03:00:17.840Z The first connective tissue to develop in the embryo is mesenchyme, the stem cell line from which all connective tissues are later derived. Anatomy and Physiology 2013-06-19T00:00:00Z The bones of the skull arise from mesenchyme during embryonic development in two different ways. Anatomy and Physiology 2013-06-19T00:00:00Z As has been implied in the above account, mesenchyme is usually formed from epithelial mesoderm or from endoderm, or from tissue destined to form endoderm. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z The bones of the appendicular skeleton arise from embryonic mesenchyme. Anatomy and Physiology 2013-06-19T00:00:00Z The ribs and sternum also develop from mesenchyme. Anatomy and Physiology 2013-06-19T00:00:00Z In contrast, the cranial base and facial bones are produced by the process of endochondral ossification, in which mesenchyme tissue initially produces a hyaline cartilage model of the future bone. Anatomy and Physiology 2013-06-19T00:00:00Z Embryologically, the appendicular skeleton arises from mesenchyme, a type of embryonic tissue that can differentiate into many types of tissues, including bone or muscle tissue. Anatomy and Physiology 2013-06-19T00:00:00Z The former is called simply epithelial mesoderm, the latter mesenchyme. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z The embryonic tissue that gives rise to all bones, cartilages, and connective tissues of the body is called mesenchyme. Anatomy and Physiology 2013-06-19T00:00:00Z This process begins as the mesenchyme within the limb bud differentiates into hyaline cartilage to form cartilage models for future bones. Anatomy and Physiology 2013-06-19T00:00:00Z The mesenchyme between the areas of bone production will become the fibrous connective tissue that fills the spaces between the developing bones. Anatomy and Physiology 2013-06-19T00:00:00Z In this process, mesenchyme accumulates and differentiates into hyaline cartilage, which forms a model of the future bone. Anatomy and Physiology 2013-06-19T00:00:00Z In Annelids with trochosphere larvae a certain amount of mesenchyme is formed at an earlier 319 stage and gives rise to the muscular bands of the young larva. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z In the head, mesenchyme will accumulate at those areas that will become the bones that form the top and sides of the skull. Anatomy and Physiology 2013-06-19T00:00:00Z The mesenchyme between these developing bones becomes the fibrous connective tissue of the suture joints between the bones in these regions of the skull. Anatomy and Physiology 2013-06-19T00:00:00Z Cells at the center of this interzone region undergo cell death to form the joint cavity, while surrounding mesenchyme cells will form the articular capsule and supporting ligaments. Anatomy and Physiology 2013-06-19T00:00:00Z During embryonic growth, bones and joints develop from mesenchyme, an embryonic tissue that gives rise to bone, cartilage, and fibrous connective tissues. Anatomy and Physiology 2013-06-19T00:00:00Z In this connexion it may be interesting to point out that in many Coelenterates all the tissues of the body retain throughout life the epithelial condition, nothing comparable to mesenchyme ever being formed. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z The sclerotomes consist of an embryonic tissue called mesenchyme, which will give rise to the fibrous connective tissues, cartilages, and bones of the body. Anatomy and Physiology 2013-06-19T00:00:00Z In both cases, the mesenchyme between the developing bones differentiates into fibrous connective tissue that will unite the skull bones at suture joints. Anatomy and Physiology 2013-06-19T00:00:00Z In the limbs, mesenchyme accumulations within the growing limb bud will become a hyaline cartilage model for each of the limb bones. Anatomy and Physiology 2013-06-19T00:00:00Z This process begins with the localized accumulation of mesenchyme tissue at the sites of the future bones. Anatomy and Physiology 2013-06-19T00:00:00Z Additional mesenchyme cells at the periphery of the interzone become the articular capsule. Anatomy and Physiology 2013-06-19T00:00:00Z They originate in the mesodermal germ layer and differentiate from mesenchyme and hematopoietic tissue in the bone marrow. Anatomy and Physiology 2013-06-19T00:00:00Z The mesenchyme differentiates into hyaline cartilage, which forms a cartilage model of the future bone. Anatomy and Physiology 2013-06-19T00:00:00Z |
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