ISSN:
1432-0878
Keywords:
Heart innervation (Turtle)
;
Monomamine-containing cells
;
Synapses
;
Fluorescence and electron microscopy
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Summary Fluorescence and electron microscopy of the turtle heart indicates the presence of monoamine-containing, granulated cells in the wall of venous sinus and near the openings of the aortic trunks. These cells occur in clusters and are always in association with nerve fibers and/or ganglion cells within the turtle heart. Vesiculated axon terminals make a synaptic contact with the cytolemma of the granulated cell which in turn makes a synapse to the processes from the other granulated cell and to the cardiac nerve fibers. The close contact occurs also between the granulated cell process and the smooth muscle cell membrane in the wall of large vessels. The granulated cell has no special relationship to the blood capillaries. The significance of these results is discussed in relation to nervous control of the cardiac activity of the turtle.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00307057
