. Directions for laboratory work in physiology for the use of medical students. Physiology. WAVD OF CONTRACTION IN FROG's HF,ART. 63 and to the ventricle (£), (the line of separation of the auricles lies behind the bulbus arteriosus) ; and the well marked auriculo-ventricular groove. Lift the ventricle with a camel's hair brush moistened with saline solution, and notice the place where the vena cava inferior opens into the sinus venosus (F) ; the white crescentic line where the sinus joins the auricle; also the frenum, a slender ligament which attaches the dorsal wall, of the ventricle to the
. Directions for laboratory work in physiology for the use of medical students. Physiology. WAVD OF CONTRACTION IN FROG's HF,ART. 63 and to the ventricle (£), (the line of separation of the auricles lies behind the bulbus arteriosus) ; and the well marked auriculo-ventricular groove. Lift the ventricle with a camel's hair brush moistened with saline solution, and notice the place where the vena cava inferior opens into the sinus venosus (F) ; the white crescentic line where the sinus joins the auricle; also the frenum, a slender ligament which attaches the dorsal wall, of the ventricle to the peri- cardium. Ventral View. 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. 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 Lombard, Warren
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectphysiology, bookyear1
