Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

Record number 410152
Title Representing tissue mass and morphology in mechanistic models of digestive function in ruminants
Author(s) Bannink, A.; Dijkstra, J.; France, J.
Source In: Modelling nutrient digestion and utilisation in farm animals / Sauvant, D., van Milgen, J., Faverdin, P., Friggens, N., Wageningen Academic Publishers - ISBN 9789086861569 - p. 168 - 175.
DOI http://dx.doi.org/10.3920/978-90-8686-712-7_18
Department(s) LR - Backoffice
Animal Nutrition
WIAS
Publication type Peer reviewed book chapter
Publication year 2011
Abstract Representing changes in morphological and histological characteristics of epithelial tissue in the rumen and intestine and to evaluate their implications for absorption and tissue mass in models of digestive function requires a quantitative approach. The aim of the present study was to quantify tissue mass (M) and absorptive area (AA) from parameters that are easily derived from morphological inspection and histology of tissue biopsies, and to compare this representation with approaches in current model of digestive function. Relatively small changes of 5% in some morphological and histological characteristics were calculated to affect absorptive area (AA) and epithelial tissue mass (M) strongly in the rumen and the intestine of cattle. The cumulative effect of changes in volume, height and width of primary protrusions and of secondary protrusions of the rumen wall was 18% for rumen mucosal AA and 29% for rumen serosal AA. It was 24% for intestinal mucosal AA. The cumulative effect on rumen and intestinal M was 20% and 22%, respectively. The simulations indicate that allometric functions that relate volume or weight to AA and M require exponentiation with an exponent higher than those based on geometric shape or volume.
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