Download Biology of Earthworms by C.A. A Edwards PDF

By C.A. A Edwards

Show description

Read Online or Download Biology of Earthworms PDF

Best biology books

Bacterial Toxins: Methods and Protocols

The curiosity of investigators throughout a extensive spectrum of medical dis- plines has been progressively motivated through the sector of bacterial toxin learn, a space that uses a wide number of organic, chemical, physicochemical, and medically orientated techniques. Researchers learning bacterial pollutants have to be conversant in these kind of disciplines so as to paintings successfully within the box.


Quantity 322 of tools in Enzymology is devoted to apoptosis. significant issues coated contain measuring apoptosis and apoptosis-induced endonucleases, measuring apoptosis in decrease organisms, proteases eager about apoptosis and their inhibitors, mobilephone unfastened structures for tracking steps in apoptosis pathways, mitochondria and apoptosis, bCl-2 kinfolk proteins, and learning receptors and sign transduction occasions implicated in cellphone survival and cellphone dying.

Molecular Biology of Chromosome Function

Chromosomes have constitution, decided through the interactions of proteins with DNA, and chromosomes have services, specifically, replication of DNA and transcription of messenger RNA. Chromosome constitution and serve as aren't separate issues, in view that chromosome association professional­ foundly affects the job of the genome in replication and transcrip­ tion.

Extra info for Biology of Earthworms

Example text

The mouth of the nephrostomal funnel is flattened into two lips, an upper posterior lip and a lower anterior lip. The upper lip is much larger than the lower lip, and forms a semicircular expansion overhanging and projecting beyond the lower lip (Fig. 11). 'It may help the explanation to imagine that an ordinary conical funnel be compressed anterio-posteriorly, one lip much expanded and the lateral ends of the funnel depressed so as to increase the projection of the smaller lip' (Stephenson, 1930).

The coasts of Sardinia and southern France. Eodrilus Michaelsen. Distribution as for Acanthodrilus. Diprochaeta Beddard. (Australia, Queensland, Victoria, Tasmania) New Zealand and islands, India. ) (d) Family OCTOCHAETIDAE Description as for Acanthodrilidae except excretory system meronephric (Gates, 1959). Genera Howascolex Michaelsen. South India, South Madagascar. Octochaetus Beddard. India, New Zealand. Deinodrilus Beddard. New Zealand. Hoplochaetina Michaelsen. New Zealand. Ramiella Stephenson.

The coelomic fluid contains many different kinds of particles in suspension. The inorganic inclusions are mainly crystals of calcium carbonate, but the corpuscular bodies in the coelomic fluid of lumbricid worms include phagocytic amoebocytes, feeding on waste 'llaterials; vacuolar lymphocytes (small disk-shaped bodies which do MORPHOLOGY 19 not occur in worms with large numbers of eleocytes) and mucocytes (lenticular bodies which give the coelomic fluid a mucilaginous component). Other inclusions in the coelomic fluid include breakdown products of the corpuscular bodies, protozoan and nematode parasites, and bacteria.

Download PDF sample

Rated 4.49 of 5 – based on 15 votes