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Record Details

Record 69 of 1431
Embryonic development during chronic acceleration
Author and Affiliation:
Smith, A. H.(California Univ., Davis, CA, United States)
Abbott, U. K.(California, University, Davis, CA, United States)
Abstract: Experiments carried out on chicken eggs indicate that the embryo is affected during very early development, especially over the first four days, and during hatching. In the first four days, the brain develops as well as the anlage for all other organs. In addition, the heart commences to function and the extraembryonic membranes that compartmentalize the egg contents form. The latter require an appreciable extension and folding of tissue which may be disrupted by the mechanical load. Observations of embryonic abnormalities that occur during chronic acceleration suggest an inhibition of development of the axial skeleton, which is rarely seen otherwise, a general retardation of embryonic growth, and circulatory problems. The final stages of development (after 18 days) involve the uptake of fluids, the transition to aerial respiration, and the reorientation of the embryo into a normal hatching position. At 4 G mortality is very high during this period, with a majority of embryos failing to reorient into the normal hatching position.
Publication Date: Jan 01, 1982
Document ID:
19820057220
(Acquired Nov 30, 1995)
Accession Number: 82A40755
Subject Category: LIFE SCIENCES (GENERAL)
Document Type: Journal Article
Publisher Information: United States
Contract/Grant/Task Num: NSG-7493
Financial Sponsor: NASA; United States
Organization Source: California Univ.; Davis, CA, United States
Description: 2p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ACCELERATION STRESSES (PHYSIOLOGY); BIOLOGICAL EVOLUTION; CHRONIC CONDITIONS; EMBRYOS; BIOLOGICAL EFFECTS; CHICKENS; CIRCULATORY SYSTEM; DIFFERENTIATION (BIOLOGY); EGGS; EMBRYOLOGY; MORTALITY; MUSCULOSKELETAL SYSTEM
Imprint And Other Notes: (International Union of Physiological Sciences, Annual Meeting, 3rd, Innsbruck, Austria, Sept. 29-Oct.2, 1981.) Physiologist, Supplement, vol. 24, Dec. 1981 (1982), p. S-73, S-74.
Availability Source: Other Sources
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