Consulta: subjectFacets:"Functional anatomy"
Registros recuperados: 6
Data/hora: 11/06/2024 01:18:00

Origin, Evolution and Homologies of the Weberian Apparatus: A New Insight
Provedor de dados: International Journal of Morphology
Autores: Diogo,Rui.
The Weberian apparatus is essentially a mechanical device improving audition, consisting of a double chain of ossicles joining the air bladder to the inner ear. Despite being one of the most notable complex systems of teleost fishes and the subject of several comparative, developmental and functional studies, there is still much controversy concerning the origin, evolution and homologies of the structures forming this apparatus. In this paper I provide a new insight on these topics, which takes into account the results of recent works on comparative anatomy, paleontology, and ontogeny as well as of a recent extensive phylogenetic analysis including not only numerous otophysan and non-otophysan extant otocephalans but also ostariophysan fossils such as...
Tipo: Journal article
Palavras-chave: Evolution; Functional anatomy; Ostariophysi; Otocephala; Otophysi; Phylogeny; Teleostei; Weberian apparatus.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000200008

Ultrastructural and functional aspects of the spermatheca in the american harlequin bug, Murgantia histrionica (Hemiptera: Pentatomidae)
Provedor de dados: Neotropical Entomology
Autores: Stacconi,MVR; Romani,R.
The spermatheca of Murgantia histrionica (Hahn) was investigated using fluorescence, scanning and transmission electron microscopy. The aim of the study was to elucidate the structure of this organ, pointing out differences between mated and unmated females. Results have shown an elaborated cuticular structure associated with muscular and glandular tissues. The spermatheca is joined with the common oviduct by the spermathecal duct, forming a thin saccular dilation through two consecutive invaginations. The distal part of the organ is formed by a series of two communicating cuticular chambers. The first cylindrical-shaped chamber, corresponding to the coiled region, is wrapped by longitudinal muscular fibers suspended between two cuticular flanges. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hemiptera; Functional anatomy; Spermathecal gland; Electron microscopy.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2011000200011

OSTEOLOGY OF THE FEEDING APPARATUS OF MAGNIFICENT FRIGATEBIRD FREGATA MAGNIFICENS AND BROWN BOOBY SULA LEUCOGASTER (AVES: SULIFORMES)
Provedor de dados: Papéis Avulsos de Zoologia
Autores: CARLOS,CAIO JOSÉ; ALVARENGA,JÉSSICA GUIMARÃES; MAZZOCHI,MARIANA SCAIN.
ABSTRACT In this paper, we describe the skulls of Magnificent Frigatebird Fregata magnificens (Fregatidae) and Brown Booby (Sulidae) Sula leucogaster, with focus on the structures associated with the Musculi mandibulae. We discuss the results in the context of the feeding biology of the two species, which feed mainly on flying fish and squids. Frigatebirds capture prey from just above, or just below, the water surface in flight. The hook-shaped Apex maxillae in F. magnificens can be viewed as an adaptation for grasping prey from near the water surface. Boobies catch prey by plunging; thus, the dorsoventrally flattened skull and conical bill of S. leucogaster may reduce water resistance when it dives, or swims underwater. The bill is long in both species,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Functional anatomy; Jaw apparatus; Mandible musculature; Seabirds; Syncranium.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492017002000265

Anatomia funcional de Protothaca (Leukoma) pectorina (Lamarck) (Bivalvia, Veneridae)
Provedor de dados: Zoologia
Autores: Guerón,Cordélia de Oliveira Castro; Narchi,Walter.
Protothaca (Leukoma) pectorina (Lamarck, 1818) lives from the West Indies to Santa Catarina State, Brazil, in soft muddy beaches in quiet waters of protected bays with little amounts of suspended material. A study of the functional anatomy of P. pectorina and its ecological aspects were undertaken. The anatomy and functioning of the stomach and the mechanisms for selection of particles were observed. The siphons, ctenidia, labial palps and stomach were analised and related to the animal's natural environment. The siphons belong to type B (Yonge 1948), the ctenidia to type C (1a) (Atkins 1937). The ctenidia are homorhabdic (Ridewood 1903) and the stomach belongs to type V (Purchon 1960).
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bivalvia; Veneridae; Protothaca pectorina; Functional anatomy; Brazilian littoral.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000400011

Anatomia funcional de Perna perna (Linné) (bivalvia, Mytilidae)
Provedor de dados: Zoologia
Autores: Narchi,Walter; Galvão-Bueno,Mario Sérgio.
Perna perna (Linné, 1758) occurs on the Atlantic littoral from Venezuela to Uruguay. The main organ systems were studied in the living animais, particular attention being paid to the ciliary feeding and cleansing mechanisms in the mantle cavity. The anatomy, functioning of the stomach and the ciliary sorting mechanisms are described. The siphons belong to type A (Yongf. 1948b), the ctenidia to type B( 1) (Atkins 1936c) and the stomach is of type III (Purchon 1957) or Section I (Dinamani 1967) with sorting mecanisms of type A and B (Reid 1965). A general comparison was made between the genera of the Mytilidae known and some features of Mytella Soot-Ryen, 1955.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bivalvia; Mytilidae; Perna perna; Functional anatomy; Brazilian littoral.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751997000100014

A reduced, yet functional, nectary disk integrates a complex system of floral nectar secretion in the genus Zeyheria (Bignoniaceae)
Provedor de dados: Acta Botanica Brasilica
Autores: Machado,Silvia Rodrigues; Souza,Camila Vaz de; Guimarães,and Elza.
ABSTRACT The genus Zeyheria (Bignoniaceae) comprises only two species, both of which have been described as possessing a reduced and non-functional nectary disk. Despite the importance of this evolutionary change in the floral nectary, these functional assumptions have been based on disk size and on the distribution, abundance and histochemistry of corolla-borne trichomes. By combining methods on light and electron microscopy, here we investigated the functionality of the reduced nectary disk and describe all of the tissues and structures of the nectar chamber in order to determine the sites of floral nectar secretion in both Zeyheria species. . Our data find the floral nectary traits of both species to be very similar, although differing in their cellular...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bignoniaceae; Floral nectary; Functional anatomy; Histochemistry; Ultrastructure.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000300344