Maxim Travel Books > Chemical > Download Chemical Zoology. Annelida, Echiuria, And Sipuncula by Marcel Florkin PDF

Download Chemical Zoology. Annelida, Echiuria, And Sipuncula by Marcel Florkin PDF

By Marcel Florkin

Chemical Zoology, quantity IV: Annelida, Echiura, and Sipuncula offers chemical info on zoological value of Annelida, Echiura, and Sipuncula. This booklet is equipped into thirteen chapters that take on the organic and biochemical features of those phyla.
The establishing bankruptcy describes the comparative anatomy, phylogeny, and class of Annelida, Echiura, and Sipuncula. The publication is going on discussing the organic elements of those phyla, together with meals and digestion; breathing and effort metabolism; oxygen delivery; and carbohydrate and nitrogen metabolism. This quantity additionally covers those organisms' composition of guanidine compounds and phosphagens, lipids, inorganic elements, and pigments. different chapters take care of the expansion and improvement, luminescence, endocrines, and pharmacologic homes of Annelida, Echiura, and Sipuncula.
This publication is a useful source for zoologists and biochemists.

Show description

Read or Download Chemical Zoology. Annelida, Echiuria, And Sipuncula PDF

Best chemical books

Elevated Temperature Coatings: Science and Technology IV

This convention complaints makes a speciality of processing and characterizing high-temperature coatings with reference to engineering, actual, and chemical houses. It comprises the synthesis of latest and unconventional coating fabrics and addresses a number of present tools besides novel and leading edge suggestions of manufacturing coatings and their purposes.

Soil Chemical Analysis

This booklet supplies the main often used soil chemical research procedures,
useful in guide and learn in soil chemistry, soil fertility,
and soil genesis. simply because plant development is basically on the topic of those fields,
procedures are given for plant inorganic materials. extra specialized
procedures of those fields have needed to be excluded within the curiosity of space
economy. the scholar in a soil chemical research path will, later in research,
find a continuous desire of the knowledge given. the trainer will
find time-saving discussions of rules.

Extra info for Chemical Zoology. Annelida, Echiuria, And Sipuncula

Sample text

As metameri­ cally segmented protostomatous worms with a patent coelom, the an­ nelids represent a homogeneous phylum clearly distinguished from all other phyla. On the single issue of metamerism there is a great and critical g a p between the Annelida and the Echiura and Sipuncula, and to redefine the Annelida to include nonsegmented worms would result in a very broad and heterogeneous group. Drawing boundaries between 1. SYSTEMATICS AND PHYLOGENY: ANNELIDA, ECHIURA, SIPUNCULA 21 higher taxa and defining them is inevitably in some degree arbitrary.

The worm was also regarded as primitively simple by Perrier ( 1 8 7 5 ) , Hatschek ( 1 8 7 8 ) , Fraipont ( 1 8 8 7 ) , Salensky (1907) and MacBride ( 1 9 1 4 ) , for somewhat different reasons, and the features of adult Polygordius which were particularly regarded as primitive are as follows (Hatschek, 1 8 7 8 ) : 1. Its lack of chaetae. 2. The esophagus remains confined to the head region, unlike that of polychaetes, in which it extends into the anterior body segments. The segments of Polygordius are therefore all completely homonymous.

The problem of arranging polychaete families in a phyletic series is obviously absurdly difficult and w e cannot b e confident that the situa­ tion in the Oligochaeta is much better. T h e preoccupation of oligochaete systematists with the genital system, almost to the exclusion of other characters, may well give the spurious impression that the interpretation of the phylogeny of this subclass is simple b y comparison with poly­ chaetes, but, as w e have already seen, it is not difficult to arrange existing animals in a phyletic series if only a single character is considered.

Download PDF sample

Rated 4.99 of 5 – based on 45 votes