Hemodynamics in the pink abalone,Haliotis corrugata (mollusca, gastropoda). I. Pressure relations and pressure gradients in intact animals

✍ Scribed by Bourne, George B. ;Redmond, James R.

• Book ID: 102892442
• Publisher: John Wiley and Sons
• Year: 1977
• Tongue: English
• Weight: 744 KB
• Volume: 200
• Category: Article
• ISSN: 0022-104X
• DOI: 10.1002/jez.1402000103

✦ Synopsis

Abstract

After establishing basic anatomical relationships in the circulatory system of the pink abalone, Haliotis corrugata, blood‐pressure measurements were made in the ventricle, aorta, left epipodial artery, afferent ctenidial veins, efferent ctenidial veins, and the pericardial chamber with strain‐gauge manometers on unrestrained specimens at 15°C. All sites showed pulsatile pressures of low magnitude. Intraventricular pressure normally ranged from slightly above ambient during diastole to about 8 cm water at systole, and produced a mean pressure gradient of 5.5 cm water between the aorta and the efferent ctenidial veins. Pressure variations and pulse waves recorded from structures within the pericardium support a constant‐volume mechanism for cardiac filling. There is no clear evidence that body movement enhanced venous return.