Results 181 to 190 of about 10,890 (229)

Histology and ultrastructure of the hepatopancreas of the tigerfish, Hydrocynus forskahlii

Journal of Morphology, 1996
Study of the histology and ultrastructure of the hepatopancreas of the tigerfish, Hydrocynus forskahlii shows that the liver parenchyma is divided into irregularly shaped lobules, separated by the exocrine pancreas and associated connective tissue. The hepatocytes are arranged in interconnecting cords or laminae, two to three cell layers in thickness ...
H J, Geyer, Maria M, Nel, J H, Swanepoel
openaire   +2 more sources

The peroxisomes of the hepatopancreas in marine gastropods

Biology of the Cell, 1994
Summary— An ultrastructural study of the peroxisomes was performed in the hepatopancreas of six species of marine gastropods. Peroxisome morphology was described in the basophilic cells and digestive cells of each species. The identification of this organelle was supported by the cytochemical detection of catalase.
Alexandre Lobo‐da‐Cunha, Carla Batista, Elsa Oliveira   +2 more
openaire   +1 more source

Hydrolytic enzymes of the hepatopancreas of the ascidian, Pyura stolonifera

Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1973
Abstract 1. 1. The hepatopancreas or digestive gland of the ascidian, Pyura stolonifera, contains a wide spectrum of hydrolytic enzymes, including protease, esterase and phosphomonoesterase activities. 2. 2. The proteolytic activity exhibited maximal activity at pH 8·5; the phosphomonoesterase activity exhibited maximal actvity at pH 10, with
P J, Schofield, B W, Stewart
openaire   +3 more sources

The peroxisomes of the hepatopancreas in two species of chitons

Cell and Tissue Research, 1997
. This paper presents the first description of peroxisomes in polyplacophorans. As in other molluscs, the hepatopancreas of chitons is composed of basophilic and digestive cells. In the basophilic cells, the endoplasmic reticulum is abundant and several Golgi stacks can be observed.
openaire   +2 more sources

Functional cytology of the hepatopancreas of decapod crustaceans

Journal of Morphology, 2019
AbstractThis article reviews the morphogenesis, morphology, histology, ultrastructure, and structural–functional relationships of the hepatopancreas, the main metabolic organ of the Decapoda. The hepatopancreas develops in early larval stages from a pair of lateral lobes of the midgut anlage. In adults, it consists of hundreds of blindly ending tubules
openaire   +2 more sources

Intercellular junctions in the hepatopancreas of the lobster Nephrops norvegicus

Biology of the Cell, 1985
The hepatopancreas of the lobster has recently been found to be a rich source of material from which to isolate arthopod gap junctions biochemically (Finbow et al., 1983a; 1984). It has therefore been studied here to assess the features of these intercellular junctions and any others that may be present, in vivo.
N J, Lane, J B, Harrison, W M, Lee
openaire   +2 more sources

The regulation of pyruvate kinase in the hepatopancreas of Carcinus maenas)

Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1976
Abstract 1. 1. Estimation of the activity of pyruvate kinase and pyruvate carboxylase in the hepatopancreas of Carcinus maenas gave values of 28.5 and 7.4 units/g wet wt tissue respectively. 2. 2. The concentrations of substrates, products and allosteric effectors of these enzymes in hepatopancreas were measured. 3. 3. The activities of
I G, Giles, P C, Poat, K A, Munday
openaire   +2 more sources

Purine phosphoribosyltransferases in the hepatopancreas of Helix pomatia (Gastropoda)

Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1975
Abstract 1. 1. In hepatopancreas of a purinotelic snail, Helix pomatia, hypoxanthine-guanine phosphoribosyltransferase and adenine phosphoribosyltransferase were found; high activity towards xanthine was also present. 2. 2. The two enzymes differ considerably in their stability, optimal pH and temperature and in their inhibition by ...
J, Barankiewicz, M M, Jezewska
openaire   +2 more sources

A study of growth and cell differentiation in the hepatopancreas of the crayfish

Developmental Biology, 1964
Abstract The histology of the crayfish hepatopancreas has been presented. Also, cell types within the tubule have been distinguished on a histochemical basis. Labeling studies employing tritiated thymidine and uridine have been carried out. There is strong evidence that all the cells in the tubules of the digestive gland arise from embryonic cells ...
L E, DAVIS, A L, BURNETT
openaire   +2 more sources

Cytopathology and immune response in the hepatopancreas of decapod crustaceans

Diseases of Aquatic Organisms, 2020
The hepatopancreas of decapod crustaceans is used as an example to illustrate the range of cytopathologies, detoxification mechanisms, and immune responses that environmental toxicants and pathogens can induce in a single organ. The hepatopancreas is the central metabolic organ of decapods and consists of hundreds of blindly-ending tubules and ...
openaire   +2 more sources