منابع مشابه
Adrenalin in Annelids
1. The sympathetic nervous system and the adjuvant adrenalin-secreting system are found in their earliest form in the annelid kingdom, and consist of cells situated in the central nervous system which are the common ancestors of both, and which are both secretory and nervous in function. 2. These cells are developed in the annelid kingdom parallel with the development of a contractile vascular ...
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متن کاملEvolutionary crossroads in developmental biology: annelids.
Annelids (the segmented worms) have a long history in studies of animal developmental biology, particularly with regards to their cleavage patterns during early development and their neurobiology. With the relatively recent reorganisation of the phylogeny of the animal kingdom, and the distinction of the super-phyla Ecdysozoa and Lophotrochozoa, an extra stimulus for studying this phylum has ar...
متن کاملUndulatory locomotion of polychaete annelids:
The undulatory locomotion of polychaete annelid worms is studied as a biological paradigm of a versatile body morphology and effective motion control, adaptable to a large variety of unstructured and tortuous environmental conditions (water, sand, mud, sediment, etc.). Computational models of this type of locomotion have been developed, based on the Lagrangian dynamics of the system, on resisti...
متن کاملThe Polychaetous Annelids of Alaska
THIS PAPER is based on the polychaetous annelids obtained by the Alaska King Crab Investigation, which was sponsored by the United States Fisheries Commission. The annelids were taken almost entirely from southern and southwestern Alaska, from Port Ashton west to the western end of the Alaska Peninsula (Map I). In addition, some were obtained from scattered stations eastward to Icy Straits, nea...
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ژورنال
عنوان ژورنال: American Zoologist
سال: 1983
ISSN: 0003-1569
DOI: 10.1093/icb/23.1.145