Abstract:
:In this descriptive study, we characterize the diaphragm and lungs of the short-nosed echidna, Tachyglossus aculeatus, using a combination of gross anatomical, light-microscopic, electron microscopic, and morphometric techniques, including airway casting. The diaphragm is inclined from ventro-cranial to dorso-caudal and possesses a large central tendon (centrum tendineum). The crural and costal muscle groups and the associated trigoni are located in the same positions as in other mammals. The bronchial branching pattern reveals cranially broad, tapering stem bronchi and an unusually small number of first order bronchi. The asymmetrical primary branching pattern and possibly also the asymmetry of right and left lungs are plesiomorphic within the Mammalia. The histology and ultrastructure of the airways and lung parenchyma reveal no unusual features: alveolar type 1 and type 2 cells in the parenchyma; type 2 cells, exocrine bronchiolar cells (Clara cells), ciliated cells, and goblet cells in the terminal airways and the latter two cell types in the bronchi. Both a double and a single capillary net are found on the interalveolar septa. The high capillary loading of the double net may be of selective advantage because of long apneas and low metabolic rate in the echidna.
journal_name
J Morpholjournal_title
Journal of morphologyauthors
Perry SF,Schmitz A,Andersen NA,Wallau BR,Nicol Sdoi
10.1002/(SICI)1097-4687(200003)243:3<247::AID-JMORkeywords:
subject
Has Abstractpub_date
2000-03-01 00:00:00pages
247-55issue
3eissn
0362-2525issn
1097-4687pii
10.1002/(SICI)1097-4687(200003)243:3<247::AID-JMORjournal_volume
243pub_type
杂志文章abstract::An ovarian follicle of Drosophila consists of an oocyte, 15 nurse cells, and hundreds of follicular epithelial cells. A freeze-fracture analysis of the surfaces between glutaraldehyde-fixed ovarian cells showed that all three cell types were interconnected by gap junctions. This is the first report of gap junctions be...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051850109
更新日期:1985-07-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051710205
更新日期:1982-02-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
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更新日期:1984-06-01 00:00:00
abstract::The penises of bats are taxonomically distinctive in size and shape. In addition, they are variable in microscopic anatomy, indicating that histomorphological studies of copulatory organs of bats may help understanding their successful reproductive strategies. We studied adult males of 13 species of vespertilionid and...
journal_title:Journal of morphology
pub_type: 杂志文章
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更新日期:2019-12-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052220309
更新日期:1994-12-01 00:00:00
abstract::At mating, female insects generally receive and store sperm in specific organs of their reproductive tract called spermathecae. Some Heteroptera, such as Cimicomorpha, lack a true spermatheca; some have receptacles of novel formation where sperm cells can transit or be stored. In Tingidae, there are two sac-like diver...
journal_title:Journal of morphology
pub_type: 杂志文章
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更新日期:2010-04-01 00:00:00
abstract::The phylogenetic position of bryozoans has been disputed for decades, and molecular phylogenetic analyzes have not unequivocally clarified their position within the Bilateria. As probably the most basal bryozoans, Phylactolaemata is the most promising taxon for large-scale phylogenetic comparisons. These comparisons r...
journal_title:Journal of morphology
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更新日期:2011-03-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051370303
更新日期:1972-07-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051680309
更新日期:1981-06-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1080
更新日期:2002-02-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/(SICI)1097-4687(199710)234:1<51::AID-JMOR5
更新日期:1997-10-01 00:00:00
abstract::Nuclear and cytoplasmic volume changes as well as the elimination of residual spermatid cytoplasm were investigated in the red-ear turtle (Pseudemys scripta) and the rooster (Gallus domesticus). Nuclei of newly formed spermatids which were originally centrally located became eccentrically located within the cell in bo...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051980110
更新日期:1988-10-01 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 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::According to the current opinion, lymph-heart striated muscle represents a specialized type of skeletal muscles in frogs. Here, we studied muscle fibers in mechanically damaged lymph hearts during the first postoperative week using electron-microscopic autoradiography. We present evidence that both, the satellite cell...
journal_title:Journal of morphology
pub_type: 杂志文章
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更新日期:2015-12-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051870305
更新日期:1986-03-01 00:00:00
abstract::Morphological features of the goldfish caudal neurosecretory system were investigated by means of immunohistochemical localization of urotensins I and II (UI and UII) and electron microscopic examination of the caudal neurosecretory neurons, the urophysis, and the synaptic neuropil. The aim of the work is to provide a...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/(SICI)1097-4687(199801)235:1<59::AID-JMOR5
更新日期:1998-01-01 00:00:00
abstract::We investigated muscle development in the Japanese flounder Paralichthys olivaceus, focusing primarily on the cranial muscles, using a whole mount immunohistochemical staining method. It is well established that during the very early stages of morphogenesis, until 4 days post hatching (dph), muscles required for feedi...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10833
更新日期:2010-07-01 00:00:00
abstract::Three lineages of cartilaginous fishes have independently evolved filter feeding (Lamniformes: Megachasma and Cetorhinus, Orectolobiformes: Rhincodon, and Mobulidae: Manta and Mobula); and the structure of the branchial filters is different in each group. The filter in Rhincodon typus has been described; species withi...
journal_title:Journal of morphology
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更新日期:2013-09-01 00:00:00
abstract::The sagittal otolith of Hyperoglyphe antarctica (Centrolophidae: Teleostei) has a prismatic structure in which the anti-sulcal growth axes of each prism consist of a series of nested cones each composed of a mineral layer followed by an organic matrix layer. Broken sections show the mineral layers to be composed of st...
journal_title:Journal of morphology
pub_type: 杂志文章
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更新日期:1995-02-01 00:00:00
abstract::Cubozoans have a complex lifecycle in many ways similar to the scyphozoan lifecycle. The sexual reproduction within cubozoans varies between species with one clade having copulation and internal fertilization and the release of planula larvae. This cubozoan clade, the family Tripedaliidae, includes three species, Copu...
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pub_type: 杂志文章
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abstract::All developmental stages of Tanystylum bealensis are described. This is the first complete developmental series of a pycnogonid species collected from a natural, rather than a laboratory-reared population. Development proceeds through a series of nine instars from egg to adult, with major defining characteristics of t...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10402
更新日期:2006-03-01 00:00:00
abstract::The Eurasian lynx (Lynx lynx) is a medium-sized felid, with a tendency to hunt for prey larger than itself. We studied the lynx hindlimb musculoskeletal anatomy in order to determine possible anatomical adaptations to hunting large prey. In our previous work, we had found characters of both large and small felids in t...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.21328
更新日期:2021-01-25 00:00:00
abstract::The location and arrangement of the pancreatic endocrine tissue in larval and adult Geotria australis (Geotriidae) differ markedly from those exhibited by the comparable stages of Northern Hemisphere lampreys (Petromyzontidae). In larval Geotria australis, the main zones of islet proliferation are located laterally be...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051840302
更新日期:1985-06-01 00:00:00
abstract::The surface of a mature, pelagic C-O sole egg is composed of polygonal chambers having four to eight sides, most of which are hexagonally shaped. This honeycomb pattern initially appears on primary oocytes as a thin layer of compact, electron-dense material. Discrete thickenings begin to develop on the envelope of per...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051780305
更新日期:1983-12-01 00:00:00
abstract::The mode of sexual reproduction and embryogenesis was compared in 3 species of Botrylloides: B. simodensis, B. lenis, and B. violaceus. In all species, a testis and an egg (occasionally 2 eggs), the former being anterior to the latter, mature in the mantle on either side of a zooid. The egg is surrounded by 2 follicul...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051930305
更新日期:1987-09-01 00:00:00
abstract::Cytoplasmic microtubules can be divided into two subpopulations: 1) those adjacent to the nucleus (perinuclear), and 2) those distributed between the myofilament bundles (nonperinuclear). Previous observations (Cartwright and Goldstein, '83) indicate total cytoplasmic microtubule numeric density increases to a maximum...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051790103
更新日期:1984-01-01 00:00:00
abstract::The evolution of viviparity alters the physical relationship between mothers and offspring and the prevalence of viviparity among squamate reptiles presents an opportunity to uncover patterns in the evolution of placental structure. Understanding the breadth of this diversity is limited because studies of placental st...
journal_title:Journal of morphology
pub_type: 杂志文章
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更新日期:2019-01-01 00:00:00
abstract::Gross and histological examination of all extant families of turtles revealed that the buccopharyngeal mucosa is morphologically highly varied. The tongues of aquatic species have small lingual papillae or lack them entirely, while terrestrial species have tongues with numerous glandular papillae. The pharynx and the ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051960105
更新日期:1988-04-01 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