. Fig. 13. The gross anatomy of frog's heart. (Ventral view after Cyon, dorsal -view after Howes.) A, aortae; B, right auricle; C, left auricle; D, pulmonary vein; F,' ventricle; F, sinus venosus; G, sino-auricular valves; H, bulbus .arteriosus. b. Origin and Course of the Wave of Contraction. T.—Inspfction.—Try to observe the place where the wave of contraction begins, and the order in which it spreads over the different chambers of the heart. See that when a part contracts and drives the blood out, it grows paler, while the part receiving the blood swells and flushes. The change of color beg
. Fig. 13. The gross anatomy of frog's heart. (Ventral view after Cyon, dorsal -view after Howes.) A, aortae; B, right auricle; C, left auricle; D, pulmonary vein; F,' ventricle; F, sinus venosus; G, sino-auricular valves; H, bulbus .arteriosus. b. Origin and Course of the Wave of Contraction. T.—Inspfction.—Try to observe the place where the wave of contraction begins, and the order in which it spreads over the different chambers of the heart. See that when a part contracts and drives the blood out, it grows paler, while the part receiving the blood swells and flushes. The change of color begins somewhat later than the process causing it. Answer in your notes the following questions: What is the action of the auricles during the ventricular diastole, and during the ventricular systole ? What changes are observed in the ventricle during auricular diastole, and during auricular systole? 2.—Thf Myocakdiogram.—Adjust the button on the prop of the lever to the ventricle, with the prop vertical and the lever horizontal. Be careful that both of the wire points on the under surface of the button are in contact with
Size: 2705px × 1848px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectphysiology, bookyear1
