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Elementary Biology, Animal and Human (Paperback) Loot Price: R454
Discovery Miles 4 540
Elementary Biology, Animal and Human (Paperback): James Edward Peabody
Elementary Biology, Animal and Human (Paperback): James Edward Peabody

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Elementary Biology, Animal and Human (Paperback)

James Edward Peabody

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Loot Price R454 Discovery Miles 4 540

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1913 edition. Excerpt: ... a larger supply of oxygen is sent out by arteries to all parts of the body. In the capillaries the oxygen is absorbed by the cells. Oxidation of the food and protoplasm takes place and energy is thereby released, which enables the frog to carry on locomotion, secure its food, and perform all its destined tasks. The carbon dioxid and other wastes produced by oxidation pass through the capillary walls into the blood and, as we have seen, are carried back to the heart and then to the lungs, where carbon dioxid is excreted. Other wastes are excreted by the kidneys. The skin of the frog is likewise permeated by a network of capillaries so that it acts as do the gills of fishes in absorbing oxygen from the water and in giving off carbon dioxid. While the frog is buried in the mud during the winter it breathes entirely through the skin. So much does the frog depend on the skin as a breathing organ that even in summer, if the skin becomes dry so that air cannot be absorbed, the frog dies. 86. Reproduction and life history.--In the animals studied thus far we have found special organs devoted to the process of reproduction, namely, ovaries for egg production in the female and in the male spermaries that form the sperm-cells.-Before the egg-cells can develop into embryos each must be fertilized by a sperm-cell. All the facts we have just stated apply equally well to the frog. Frogs' eggs are deposited in springtime in masses that C, egg con A, eggs before B, eggs after they taining young D, young tadpoles attaching they are laid are laid tadpole themselves to a plant t E. young tadpole with ex-F, young tadpole with ternal gills internal gills i. young tadpole with hind legs H, tadpole with webbed feet /i tadpole with legs and arms Fio. 84.--Life...

General

Imprint: Rarebooksclub.com
Country of origin: United States
Release date: October 2012
First published: October 2012
Authors: James Edward Peabody
Dimensions: 246 x 189 x 7mm (L x W x T)
Format: Paperback - Trade
Pages: 136
ISBN-13: 978-1-151-92177-2
Barcode: 9781151921772
Categories: Books
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LSN: 1-151-92177-7

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