EurekaMag
+ Translate
+ Most Popular
Gaucher's disease;thirty-two years experience at Siriraj Hospital
A study of Macrobathra Meyrick from China (Lepidoptera, Cosmopterigidae)
First occurrence in ores of tetragonal chalcocite
Effects of trace element nutrition on sleep patterns in adult women
N.Z. range management guidelines. 2. Design of grazing management systems for tussock country
A case of lipoma of the esophagus
A revision of world Acanthosomatidae (Heteroptera: Pentatomidae): keys to and descriptions of subfamilies, tribes and genera, with designation of types
Life history of the coronate scyphozoan Linuche unguiculata (Swartz, 1788)
Perceptual restoration of obliterated sounds
Mutagenicity studies on two chromium(III) coordination compounds
The formation of the skeleton. I. Growth of a long bone. 1st appearance of a center of calcification
Leucopenia and abnormal liver function in travellers on malaria chemoprophylaxis
The joint commission: four key root causes loom large in sentinel event data
Treatment of vitiligo with topical 15% lactic acid solution in combination with ultra violet-A
Behaviour of dairy cows within three hours after feed supply: I. Influence of housing type and time elapsing after feed supply
Observations of the propagation velocity and formation mechanism of burst fractures caused by gunshot
Management and control of patients with type 2 diabetes mellitus in Lebanon: results from the International Diabetes Management Practices Study (IDMPS)
The diet composition and nutritional knowledge of patients with anorexia nervosa
Physoporella croatica Herak, 1958 of the Slovak karst Anisian (Slovakia, the West Carpathians Mts.)
Bright lights, big noise. How effective are vehicle warning systems?
Ein Plesiosaurier-Rest mit Magensteinen aus mittlerem Lias von Quedlinburg
Incidence of Chlamydia trachomatis in patients with sterility
Monster soup: the microscope and Victorian fantasy
Preliminary tests with residual sprays against poultry lice
Duration of the life of plants in phylogeny

Functional micro anatomy of the digestive gland of the scallop pecten maximus l


Functional micro anatomy of the digestive gland of the scallop pecten maximus l



Aquatic Living Resources 4(3): 191-202



ISSN/ISBN: 0990-7440

DOI: 10.1051/alr:1991021

The digestive gland of Pecten maximus consists, as in other lamellibranchs, of numerous blind-ending tubules which communicate with the stomach by partially ciliated main ducts and non ciliated secondary ducts. The non-ciliated cells of the main ducts are characterized by a well developed brush border constituted by high and dense microvilli and a strong pinocytotic activity. Ciliated and non ciliated cells have a very similar fine structure. The digestive tubules have a large lumen and contain digestive cells at different stages of absorption, digestion and excretion, one part of the tubules being functional while the other is disintegrating. The dark crypts contain the flagellated secretory cells, characterized by a well developed granular endoplasmic reticulum, and the young immature cells which may replace both the secretory and digestive cells. The numerous lipid droplets occurring in the digestive duct cells and in the digestive cells reveal the lipid storage function of the digestive gland. Several enzyme activities involved in digestion have been localized in the digestive gland. High amylase activity and cellulase and lysozyme activities have been found in the ducts and in the tubules, whereas no proteolytic activity could be detected histochemically. Some intracellular peptidases and glycosidases have been localized in the cells of the digestive gland, especially in the brush-border cells of the ducts and in the functional part of the tubules. High alkaline and acid phosphatase activities are displayed by the duct brush-border cells and the digestive and secretory cells. These results show the main role of the digestive gland, both in extracellular digestion (secretion of the digestive enzymes) and in absorption and intracellular digestion and provide information on the respective functions of the different cells within these processes.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 007364532

Download citation: RISBibTeXText

Related references

Apidogenesis in the digestive gland of the bivalve mollusc Pecten maximus I Micro-anatomy of the digestive gland and structural modifications during an annual cycle Lapidogenese dans la glande digestive du mollusque bivalve Pecten maximus I Micro-anatomie de la glande digestive et modifications structurales au cours dun cycle annuel. Bulletin de la Societe Zoologique de France, 1281-2: 117-129, 2003

Adipogenesis in the digestive gland of the bivalve mollusc Pecten maximus. I. Micro-anatomy of the digestive gland and structural modifications during an annual cycle. Bulletin de la Societe Zoologique de France 128(1/2): 117-129, 2003

Distribution of Domoic Acid in the Digestive Gland of the King Scallop Pecten maximus. Toxins 12(6), 2020

Seasonal digestive gland dynamics of the scallop Pecten maximus in the Bay of Brest (France). Journal of the Marine Biological Association of the United Kingdom 81(4): 663-671, 2001

Purification and partial characterization of chymotrypsin-like proteases from the digestive gland of the scallop Pecten maximus. Comparative Biochemistry and Physiology B Comparative Biochemistry and Molecular Biology 110(4): 777-784, 1995

Cadmium binding components of scallop pecten maximus digestive gland partial purification and characterization. Comparative Biochemistry and Physiology C Pharmacology Toxicology and Endocrinology 85(2): 259-268, 1986

Transcriptional Response in the Digestive Gland of the King Scallop ( Pecten maximus ) After the Injection of Domoic Acid. Toxins 13(5), 2021

Cadmium binding components of scallop (Pecten maximus) digestive gland, partial purification & characterization. Comparative Biochemistry and Physiology C Comparative Pharmacology 852: 259-268, 1986

Distribution and linkage of domoic acid (amnesic shellfish poisoning toxins) in subcellular fractions of the digestive gland of the scallop Pecten maximus. Toxicon: Official Journal of the International Society on Toxinology 55(2-3): 606-611, 2010

Metals and metalloids in the digestive gland of a bivalve pecten maximus intra cellular localization by electron probe micro analysis involvement of digestive mechanisms. Comptes Rendus des Seances de l'Academie des Sciences Serie III Sciences de la Vie 294(13): 673-678, 1982

Apidogenesis within the digestive gland of the bivalve mollusc Pecten maximus II Molecular implications Lapidogenese dans la glande digestive du mollusque bivalve Pecten maximus II Implications moleculaires. Bulletin de la Societe Zoologique de France, 1281-2: 131-140, 2003

L'adipogenèse dans la glande digestive du mollusque bivalve Pecten maximus. II. Implications moléculaires - Adipogenesis within the digestive gland of the bivalve mollusc Pecten maximus. II. Molecular implications. Congres Annuel de la Societe Zoologique de France 128(1-2): 131-140, 2003

Morphological and biochemical characterizations of the great scallop Pecten maximus metamorphosis Caracterisations morphologique et biochimique de la metamorphose de la coquille Saint-Jacques, Pecten maximus Lamarck. Comptes Rendus de l'Academie des Sciences Serie III Sciences de la Vie. Octobre; 32210: 847-853, 1999

Caractérisations morphologique et biochimique de la métamorphose de la coquille Saint-Jacques, Pecten maximus (Lamarck) - Morphological and biochemical characterizations of the great scallop Pecten maximus metamorphosis. Comptes Rendus de l'Academie des Sciences. Serie 3, Sciences de la Vie 322(10): 847-853, 1999

Molecular analysis of the seasonal expression of genes coding for different functional markers of the digestive gland of the bivalve mollusk Pecten maximus (L.). Comparative Biochemistry and Physiology. Part B Biochemistry and Molecular Biology 133(3): 417-426, 2002