解剖学和形态学
麻醉学
听力与言语-语言病理学
行为科学
心脏和心血管系统
细胞和组织工程学
临床神经病学
危重症监护医学
牙科,口腔外科和医学
皮肤病学
急诊医学
内分泌学和新陈代谢
肠胃学和肝脏学
老人病学和老年医学
卫生保健科学和服务
血液学
免疫学
传染病
综合和补充性医学
医学伦理学
医学信息学
医学实验室技术
医学,全科和内科
医学,法律
医学,研究和试验
神经系统科学
护理
营养学和饮食学
产科医学和妇科医学
肿瘤学
眼科学
整形外科学
耳鼻喉科学
病理学
儿科学
周围血管疾病
药理学和药剂学
生理学
基本医疗保健
精神病学
公共、环境和职业卫生
放射学,核医学和医学成像
康复学
生殖生物学
呼吸系统
风湿病学
运动科学
外科学
毒理学
热带医学
泌尿学和肾脏学
病毒学
老年医学
健康政策和服务
心理学,临床
abstract::Annual fish development differs from that of other teleosts because a phase of blastomere dispersion-reaggregation spatially and temporally separates epiboly from embryogenesis. The fate of dispersed blastomeres was assessed in diblastodermic eggs of the annual fishes Cynolebias whitei and C. nigripinnis. In typical t...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052150309
更新日期:1993-03-01 00:00:00
abstract::The pattern of onset and general rate of cranial ossification are compared in two marsupials, Monodelphis domestica (Didelphidae) and Macropus eugenii (Macropodidae). In both species a similar suite of bones is present at birth, specifically those surrounding the oral cavity and the exoccipital, and in both postnatal ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052150203
更新日期:1993-02-01 00:00:00
abstract::The amphibian tongue contains two types of papilla which are believed to function in gustation and in the secretion of salivary fluid. Scanning electron microscopy reveals that columnar, filiform papillae are compactly distributed over nearly the entire dorsal surface of the tongue of the frog, Rana cancrivora, and fu...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052150106
更新日期:1993-01-01 00:00:00
abstract::A statistical and functional relationship between neural canal anatomy and locomotor mode is demonstrated in living marine mammals of the Order Carnivora. This relationship is interpreted to be the result of differential innervation and territory of musculature involved in generating the six locomotor patterns analyze...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052140311
更新日期:1992-12-01 00:00:00
abstract::The study of semithin (1 μ in thickness) and thin sections of Epon-embedded material reveals that Malpighian tubules of Formica polyctena are composed of a single cellular type throughout their length. No differentiated regions were observed. Ultrastructural traits of the epithelial cells are those of highly metabolic...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052140206
更新日期:1992-11-01 00:00:00
abstract::The feline anterior sartorius is a long strap-like muscle composed of short muscle fibers. Nerve branches that enter this muscle contain the axons of motor units whose constituent muscle fibers are distributed asymmetrically within the muscle. In the present study, twitch and tetanic isometric contractions were evoked...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052130204
更新日期:1992-08-01 00:00:00
abstract::A large sample of embryological material of the North American paddlefish Polyodon spathula (Acipenseriformes: Polyodontidae) confirms that early development in Polyodon is very similar to that reported for the sister group of Polyodontidae, the sturgeons (Acipenseridae). Polyodon illustrates many basic aspects of aci...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052130106
更新日期:1992-07-01 00:00:00
abstract::Two of the forearm flexors of the horse, the superficial and deep digital flexor muscles, are critical to support the digital and fetlock joints, exhibit differing insertions, and are passively supported by the proximal and distal check ligaments, respectively. These two muscles differ in histochemical composition and...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052120306
更新日期:1992-06-01 00:00:00
abstract::The liver of the cobia, Rachycentron canadum, was examined by gross dissection, histological, and ultrastructural procedures. Other visceral organs were examined by histological techniques only. Unique perivenous smooth muscle cords are associated with veins in these systems, but they are particularly prominent in the...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052120208
更新日期:1992-05-01 00:00:00
abstract::The innervation of the musculature of the tongue and the hyobranchial apparatus of caecilians has long been assumed to be simple and to exhibit little interspecific variation. A study of 14 genera representing all six families of caecilians demonstrates that general patterns of innervation by the trigeminal, facial, g...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052120105
更新日期:1992-04-01 00:00:00
abstract::Descriptions are provided of the histology and ultrastructure of the male internal reproductive tracts from three species of Camponotus, representing three subgenera. This study is the first to provide ultrastructural information on the testes (including spermatogenesis and spermiogenesis), seminal vesicles, and acces...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052110308
更新日期:1992-03-01 00:00:00
abstract::An otolith increment is composed of an incremental zone and a discontinous zone. Observation of the otoliths of Oreochromis niloticus with transmission and scanning electron microscopy reveals that organic fibers are concentrated in the discontinuous zone and are relatively scarce in the incremental zone. On the other...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052110210
更新日期:1992-02-01 00:00:00
abstract::The brain-microvascular architecture of the newt (Triturus cristatus carnifex) was studied by scanning electron-microscopical examination of microvascular corrosion casts. It is characterized at the leptomeningeal level by a superficial network of single vessels that leave the meningeal sheath to form hairpin-shaped c...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052100304
更新日期:1991-12-01 00:00:00
abstract::The larvae of Halicryptus spinulosus bear six rings of sensory/ locomotory appendages. Twelve pedicellate flosculi, 6 dorsal and 6 ventral, are associated with the neck-lorica junction. Newly described are two rows of 4-5 flosculi present on the dorsal and ventral plates, and 2 tubuli located on each dorsolateral and ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052100207
更新日期:1991-11-01 00:00:00
abstract::The flagellum of the thysanopteran spermatozoon has been examined by electron microscopy and computer-aided image analysis. The flagellum consists of 27 microtubular elements that probably are formed as outgrowths from three separate basal bodies. Nine of the elements are normal microtubular doublets that carry dynein...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052090309
更新日期:1991-09-01 00:00:00
abstract::The ovary of the seahorse, Hippocampus erectus, is a cylindrical tube bounded by an outer layer consisting of a mesothelium and muscular wall and by an inner luminal epithelium, with a single row of developing follicles sandwiched between the two layers. Follicles are produced by a germinal ridge, which contains oogon...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052090305
更新日期:1991-09-01 00:00:00
abstract::Osmotically induced alterations in the ultrastructure of the apical crypts of chloride cells and changes in chloride efflux were studied in striped bass (Morone saxatilis). Striped bass were divided into three groups: fish adapted to freshwater, fish transferred directly from freshwater to 100% seawater (3% salt, w/v)...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052090204
更新日期:1991-08-01 00:00:00
abstract::Spermiogenesis in the South American leptodactylid frog Odontophrynus cultripes was analyzed ultrastructurally. The spermatids undergo morphological modification while still enclosed in microtubule-rich processes of Sertoli cells. Electron-dense plates resembling junctional structures appear in regions at which the sp...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052070307
更新日期:1991-03-01 00:00:00
abstract::Rickettsiae-like structures were found in the salivary gland cells of Drosophila auraria during different larval and prepupal developmental stages, from the early 3rd instar up to 14 hr after spiracle inversion. These microorganisms are surrounded by a membrane, are constantly intracellular, and occur singly or in gro...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052070104
更新日期:1991-01-01 00:00:00
abstract::Light and electron microscopic examination demonstrated two types of non-endocrine agranular cells, cavity boundary cells and stellate cells, in the adenohypophysis of the South American lungfish, Lepidosiren paradoxa. The cavity boundary cells line the hypophyseal cleft and diverticulum and display few microvilli, oc...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052070109
更新日期:1991-01-01 00:00:00
abstract::Mature spermatozoa from spermathecae of founding queens were obtained from 5 species of ants, representing the major subfamilies Myrmicinae (Acromyrmex versicolor, Crematogaster sp.) and Dolichoderinae (Tapinoma sessile, Conomyrma insana, Conomyrma wheeleri). The ultrastructure of ant spermatozoa has many features in ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052060311
更新日期:1990-12-01 00:00:00
abstract::The spleen of sea bass (Dicentrarchus labrax) is composed mainly of red pulp, whereas the white pulp is poorly developed. The red pulp consists of clear reticular cells intermingled with blood cells, sinusoids, and melanomacrophage centers (MMCs). The MMCs are enclosed by an interrupted connective tissue capsule and s...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052060304
更新日期:1990-12-01 00:00:00
abstract::In Canis and Ursus the largest proportion of attachments of muscles of the shoulder and brachium on the scapula and humerus is direct; fewer attachments are aponeurotic or tendinous. In both genera most attachments can be associated with superficial osteological features (scars or delimitable surfaces); attachments th...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052060111
更新日期:1990-10-01 00:00:00
abstract::Analysis of lateral and dorsoventral radiographic films shows that ingestion, transport, and mastication in Pedetes capensis (Rodentia) are cyclic and their movement patterns are essentially similar for the three food types offered. During the ingestion cycle, closing of the mouth is accompanied by a backward translat...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052050310
更新日期:1990-09-01 00:00:00
abstract::The feeding mechanisms of two labrid fishes (Cheilinus chlorurus and C. diagrammus: Labridae: Perciformes) are modeled using four-bar linkage theory from mechanical engineering. The actions of the feeding mechanisms are simulated by a computer program that uses morphometric data to calculate the geometry of mechanism ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052050304
更新日期:1990-09-01 00:00:00
abstract::The female reproductive system of Sphaerodema rusticum consists of a pair of ovaries, two lateral oviducts, a median common oviduct, and a median spermatheca. Accessory glands are absent. Each ovary has five free ovarioles branching from the oviduct. Each ovariole consists of a terminal filament, germarium, vitellariu...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052050207
更新日期:1990-08-01 00:00:00
abstract::A hitherto unknown sensillum type, the "intracuticular sensillum" was identified on the dactyls of the walking legs of the shore crab, Carcinus maenas. Each sensillum is innervated by two sensory cells with dendrites of "scolopidial" (type I) organization. The ciliary segment of the dendrite is 5-6 μm long and contain...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052040311
更新日期:1990-06-01 00:00:00
abstract::The oviducts of 24 tortoises (Gopherus polyphemus) were examined using histological techniques and scanning electron microscopy to determine endometrial morphology. Measurements of endometrial characteristics (epithelial cell height, cilia length, thickness of endometrial glandular layer, and glandular diameter) in th...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052040310
更新日期:1990-06-01 00:00:00
abstract::The structure of the nephron in the ranid frog, Rana cancrivora, was studied by light and electron microscopy. This frog is the only amphibian species to live in mangrove swamps of very high salinity. The nephron consists of the following parts: renal corpuscle, ciliated neck segment, proximal tubule, ciliated interme...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052040204
更新日期:1990-05-01 00:00:00
abstract::The dorsal vessel (DV) in the abdomen of the blood-feeding insect Rhodnius prolixus was divided functionally into two regions, the heart, into which haemolymph entered the DV through four pairs of ostia located in abdominal segment VII, and the aorta, along which the haemolymph was propelled from abdominal segment VI ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052040103
更新日期:1990-04-01 00:00:00
abstract::Transmission electron microscopy reveals that the spermatocytes of the hookworm Ancylostoma caninum contain an abundance of Golgi complexes, ribosomes, specialized membranous organelles, and long strands of smooth endoplasmic reticulum. These organelles remain abundant until the early spermatid stage of sperm developm...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052030303
更新日期:1990-03-01 00:00:00
abstract::The development of the morphologic features of neurons in the anterior dorsal ventricular ridge (ADVR) has been followed in Golgi preparations from the lizard Gallotia galloti between embryonic stage 32 and post-eclosion stages of specimens 3.6-4.5 cm in length. The differentiation sequence of multipolar and bitufted ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052030305
更新日期:1990-03-01 00:00:00
abstract::The ultrastructure of five epithelial cellular types is described. (1) Absorptive-storing cells possess a striated border and accumulate lipids and glycogen. They also contain an apical multivesicular complex and numerous membrane-bound PAS-positive granules of unknown significance. (2) Zymogenic cells contain numerou...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052020203
更新日期:1989-11-01 00:00:00
abstract::Iridescent butterfly scales are structurally colored, relying upon the interaction of light with detailed architecture to produce their color. In some iridescent scales, the reflective elements are contained within the body of the scale and come in two basic forms, lattices that produce diffraction colors (analogous t...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052020106
更新日期:1989-10-01 00:00:00
abstract::Scanning electron microscopy of postnatally developing gerbil vagina (birth to maturity) shows that longitudinal folds form prior to transverse folds; the process of fold formation is initiated on the dorsal wall and proceeds ventrally. From days 1 to 7 postnatally, the vaginal epithelium is composed of either flat or...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052010309
更新日期:1989-09-01 00:00:00
abstract::Based on light microscopic observations, nerve pathways are described for the first time in the praesoma of a species of the Echinorhynchidae. The pathways are described for 18 nerves, 8 paired and 2 single, which originate from the cerebral ganglion and a post-ganglionic cell and terminate in the body wall musculatur...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052010306
更新日期:1989-09-01 00:00:00
abstract::The wall of the asymmetrical saclike lungs of the fishes Polypterus and Erpetoichthys consists of several functionally different tissue layers. Their lumen is lined by a surface epithelium composed of (1) highly attenuated cells, termed pneumocytes I; (2) pneumocytes II with lamellar bodies, presumably indicating surf...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052010206
更新日期:1989-08-01 00:00:00
abstract::The tectorial structures of the inner ear of the proteid salamander Proteus anguinus were studied with transmission and scanning electron microscopy in order to analyze the ultrastructure of the otoconial membranes and otoconial masses of the maculae and the tectorial membrane of the papilla amphibiorum. Both otoconia...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052010106
更新日期:1989-07-01 00:00:00
abstract::Changes in body morphology during growth and reproduction in the hydromedusa Eleutheria dichotoma are described in terms of variations in eight different characters: umbrella diameter, total surface area, tentacle area, umbrella area, tentacle knob diameter, number of embryos, and diameter and area of buds. Sexually (...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052000304
更新日期:1989-06-01 00:00:00
abstract::To our knowledge, this paper presents the first description of neuroendocrine complexes in invertebrates. Neuroendocrine complexes have been identified in the lamina propria of the snail gut by light microscopy using Giemsa-stained, deplasticized sections and by electron microscopy. Silver impregnations and immunocyto...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051990307
更新日期:1989-03-01 00:00:00