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  • 1
    Electronic Resource
    Electronic Resource
    The blood supply to the central nervous system of Helix pomatia (1970)
    Springer
    Cell & tissue research 111 (1970), S. 160-178 
    Details
    ISSN: 1432-0878
    Keywords: Central nervous tissue ; Blood supply ; Helix pomatia ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 1. Each paired ganglion of Helix pomatia is supplied by symmetrically arranged branches from the anterior aorta. Capillaries from these branches open into a blood space which is adjacent to, and continuous over the surface of the nervous tissue. Blood passes from this space through the epineural sheath into the body cavity sinuses. 2. With the electron microscope three tissue layers are seen separating the blood spaces from the neurons of each ganglion. These are (i) a luminal endothelium, (ii) a fibrous connective tissue layer which is mainly collagen and (iii) glial cells. 3. Both the luminal endothelium and connective tissue are freely permeable to uncharged particles of 100 Å or less.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00339783
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Neurosecretion in the vena cava of the cephalopod Eledone cirrosa (1970)
    Springer
    Cell & tissue research 104 (1970), S. 107-115 
    Details
    ISSN: 1432-0878
    Keywords: Cephalopoda ; Eledone ; Neurosecretion ; Ultrastructure ; Cardioaccelerator
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 1. It is thought that the extensive system of nerves passing into the wall of the anterior vena cava in Eledone cirrosa has a neurosecretory function. Examination of the fine structure of the nerve terminations demonstrated the presence of large numbers of electron-dense granules similar to those described in known neurosecretory tissue. 2. Extracts of the anterior vena cava have a persistent excitatory effect on the isolated Eledone heart. The activity is not attributable to 5-hydroxytryptamine, noradrenaline or adrenaline. The active factor is heat stable. The greatest level of activity was found in the inner layers of the vessel in the region where the nerves pass into the wall of the vessel, i.e. the distribution of the active principle parallels that of the nerve terminations in the vein. 3. The physiological role of the system is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00340052
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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