Read e-book online Intestinal Absorptive Surface in Mammals of Different Sizes PDF

By Robert L. Snipes

ISBN-10: 3540629866

ISBN-13: 9783540629863

ISBN-10: 3642608221

ISBN-13: 9783642608223

This treatise combines a close technique that's basic to stick to and reconstruct, and will be universally used to figure out the outside quarter or tubular organs, during this unique case improvement for the intestines. it's in particular applicable for giant gut, yet can be utilized for small gut additionally. the good virtue is the applicability on the macroscopic and microscopic degrees, measuring the full gut for decision of a floor or basal zone, and utilizing a wide encompassing sampling strategy to receive an element of floor enlargment as a result of such structural entitities as folds and plicae. a method to figure out the issue of raise as a result of microvilli is additionally brought. different factors which could impression the measurements are mentioned. software of the approach is gifted in the thought of scaling. a number of regression curves are provided to symbolize how intestinal floor region correlates with bodyweight. A unifying and correlating inspiration among morphology and morphometry is constructed. Over 20 species are included.

Show description

Read Online or Download Intestinal Absorptive Surface in Mammals of Different Sizes PDF

Best mammals books

Download PDF by John Hoogland: Conservation of the Black-Tailed Prairie Dog: Saving North

The prairie puppy is a colonial, keystone species of the grassland surroundings of western North the US. Myriad animals frequently stopover at colony-sites to feed at the grass there, to take advantage of the burrows for guard or nesting, or to prey at the prairie canine. regrettably, prairie canines are disappearing, and the present quantity is barely approximately 2% of the quantity encountered by way of Lewis and Clark within the early 1800s.

Read e-book online Mammals of the Pacific Northwest: From the Coast to the High PDF

This notable publication bargains an intimate examine the existence histories and habitats of mammals within the Pacific Northwest, from the coast to the excessive Cascades. for every species of mammal, the publication offers a actual description and distinct details on distribution, habitat, and behaviour. Over a hundred photographs.

Download PDF by David K. Gardner, Michelle Lane, Andrew J. Watson: A Laboratory Guide to the Mammalian Embryo

This publication pulls jointly the total variety of phone tradition, biochemical, microscopic, and genetic ideas to check the early mammalian embryo. earlier, there hasn't ever been one of these accomplished compendium, although there were extra targeted books of protocol, corresponding to Manipulating the Mouse Embryo, from chilly Spring Harbor.

Extra info for Intestinal Absorptive Surface in Mammals of Different Sizes

Example text

The rabbit had an astonishing factor of 25 (substantiated by Westergaard and Dietschy 1974). The latter authors argue, similar to Strocchi and Levitt (1993), that these measurements are largely theoretical. In their opinion, a mucous layer overlies the entire surface covering of the intestine, negating the advantage of the structural enlargements or at least warning that their existence should be taken into consideration. Sakata and von Engelhardt (1981) have described this layer in detail in the large intestine of rodents.

Warren warned against placing too much faith in the use of correction factors and formulas to determine surface enlargements, emphasizing that any measurement is a compromise, showing only trends and tendencies of the constantly changing states of contraction of not only the muscle components of the intestines, but also structures such as villi. Some authors (Herd and Harrop 1978; Martin et al. 1985; Bruorton and Perrin 1991) have attempted to counteract postmortum changes (especially in length) by measuring the excised tissue under water.

In one group of investigated animals, the mucosal surface appeared as classically described for humans, namely, a flat surface with pit-like openings to crypts, extending down as single tubular structures into the lamina propria (Fig. 3). A slight modification of this form is a funnel-shaped widening of the crypt opening in the form of a foveola. A second selection of animals was grouped together based on their mucosal surface appearance, namely, elevated ridges in looped configuration of varying heights and to different degrees of differen39 Table 8.

Download PDF sample

Intestinal Absorptive Surface in Mammals of Different Sizes by Robert L. Snipes

by Anthony

Rated 4.78 of 5 – based on 5 votes