. The biology of marine animals. Marine animals; Physiology, Comparative. Time (minutes) Fig. Periodic Changes in the Volume of an Intact Holothuria grisea Time scale in minutes. Each cycle in the curve represents a series of about ten cloacal contractions, increasing the body volume by 10-15 ml, followed by a contraction of the body wall. Each contraction of the cloaca drives in about 1 ml; when the body wall contracts, all of the accumulated water is driven out and the volume falls. (From Pantin and Sawaya (101).) '-0 -i-J 3 - response to touch Active elongation Bending and elo
. The biology of marine animals. Marine animals; Physiology, Comparative. Time (minutes) Fig. Periodic Changes in the Volume of an Intact Holothuria grisea Time scale in minutes. Each cycle in the curve represents a series of about ten cloacal contractions, increasing the body volume by 10-15 ml, followed by a contraction of the body wall. Each contraction of the cloaca drives in about 1 ml; when the body wall contracts, all of the accumulated water is driven out and the volume falls. (From Pantin and Sawaya (101).) '-0 -i-J 3 - response to touch Active elongation Bending and elongation. 10 15 Time (minutes) 20 25 Fig. Graph of Changes in Coelomic Pressure of Holothuria grisea (From Pantin and Sawaya (101).) contractions of the body wall can lead to rupture of the cloaca and extru- sion of the Cuvierian organs. This is usually attended by high coelomic pressures (12-18 cm H20). But extrusion of the gut can sometimes occur at moderate pressures, and does not invariably involve high pressures. Consequently other factors besides development of high coelomic pres- sures must be involved (29, 36a, 101, 108).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Nicol, J. A. Colin (Joseph Arthur Colin), 1915-. New York, Interscience Publishers
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Keywords: ., bookcentury1900, booksubjectmarineanimals, booksubjectphysiology
