Titlebook: Animal Diversity; Diana R. Kershaw Book 1983 D. R. Kershaw 1983 Agnatha.Chaetognatha.Crustacea.Ctenophora.Insecta.Integument.Phylum Kinorh

expository

大喘氣

LAP

The pseudocoelomate phyla,ence and of no evolutionary significance. Five phyla (Rotifera, Gastro- tricha, Kinorhyncha, Nematoda and Nematomorpha) whilst not sharing a common plan do show many similarities and may be grouped together as the superphylum Aschelminthes (the cavity worms). The remaining phylum, the Acanthocephala

Prologue

Phylum Annelida,mates. There are five major coelomate phyla: Annelida, Arthropoda, Mollusca, Echinodermata and Chordata, with many minor phyla. Apart from their possession of a coelom, all these animals show greater complexity than pseudocoelomate and acoelomate forms. For instance, a through gut and a circulatory

他日關(guān)稅重重

Phylum Arthropoda,,000 known species. The phylum includes 80% of the entire animal kingdom. Within the group there is an amazing range of diversity of both structure and mode of life, with representatives being found in every known habitat. However the total biomass is less than might be expected as the majority of s

biopsy

動脈

Early embryonic development: the protostomes and deuterostomes,hazardous process involving repeated cell divisions and cell movement to permit organ development and growth. Embryonic development, that is the development of the individual within the fertilized egg, may be a short or lengthy process. A short embryonic stage, which is more usual in invertebrates,

SUGAR

The minor coelomate phyla,ng from the development of a coelom are represented by these groups. There are many minor phyla, which, whilst they may include a few extremely common species, are generally not abundant in terms of either species or individual number. The majority have neither economic importance nor ecological sig

極微小

Juvenile