Framed Prints
Framed Print of A manual of elementary zoology
A manual of elementary zoology. Zoology. THE FROG : VISCERA AND VASCULAR SYSTEM 53 the ventricle, into which each opens. On the dorsal surface of the heart, opening into the right auricle, lies the still thinner walled, triangular sinus venosus. The openings between these chambers are guarded by certain valves or folds of the lining of the heart. Two simple lips of the opening between the sinus and right auricle are the sinu-auricular valves; these allow blood to flow into the auricle, but fold over to prevent its reflux. The edge of the auricular septum is cleft and projects into the ventr. A manual of elementary zoology. Zoology. THE FROG : VISCERA AND VASCULAR SYSTEM 53 the ventricle, into which each opens. On the dorsal surface of the heart, opening into the right auricle, lies the still thinner walled, triangular sinus venosus. The openings between these chambers are guarded by certain valves or folds of the lining of the heart. Two simple lips of the opening between the sinus and right auricle are the sinu-auricular valves; these allow blood to flow into the auricle, but fold over to prevent its reflux. The edge of the auricular septum is cleft and projects into the ventricle as two flaps, the auriculo-ventricular valves. Each of these is connected with the walls of the ventricle by fine cords, the chorda tendinem, so that, while blood can pass from auricles to ventricle, its reflux is prevented by its rais- ing the valves, which are kept from turning back into the auricle by the chordae ten- dineae. The opening from ventricle to truncus is guarded by three semilunar valves, shaped like watch- pockets, which are spread out by the blood when it tends to flow backwards from truncus to ventricle. The truncus arteriosus is divided internally by a second row of semilunar valves into two unequal parts, a long conus arteriosus or pylangium next the ventricle, and a short ventral aorta or synangium. The conus is incompletely divided longitudinally by a spiral valve into a cavum aorti- cum, which begins dorsal and curves round by the right to become ventral, and a cavum pulmocutaneum, which begins ventral and curves round by the left to become dorsal. The synangium is completely divided into a dorsal and a ventral. FIG. 27.—The heart of a frog, removed from the pericardium and seen from the back with the sinus venosus opened. z.u.c, Inferior vena cava; p.v. pulmonary veins; r.au.i Law. right and left auricles; s.au. opening from sinus to right auricle; s.v.c. superior vena cava ; s.v. sinus venosus ; rV'. branches of truncus cut across ; v. ven. © The Book Worm
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Media ID 48870214
Amphibian Amphibians Anatomical Anatomy Basic Basics Biological Blood Flow Cardiovascular Chambers Circulation Circulatory Description Dissection Frog Heart Internal Manual Overview Physiology Scientific Studies Systems Textbook Valves Vascular Venous Ventricle Vertebrate Vertebrates Vessels Zoological
Modern Frame 14"x12" (36x31cm)
Ready to Hang Contemporary Framed Prints adds style, protection, and a polished touch to your space - effortlessly.
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Wood effect frame, card mounted, 10x8 fade resistant photo print. Overall outside dimensions 14x12 inches (36x31cm). Environmentally and ozone friendly, 40mm wide x 15mm Polycore® moulding has the look of real wood, is durable and light and easy to hang. Biodegradable and made with non-chlorinated gases (no toxic fumes) it is efficient; producing 100 tons of polystyrene can save 300 tons of trees! Prints are glazed with lightweight, shatterproof, optical clarity acrylic (providing the same general protection from the environment as glass). The back is stapled hardboard with a sawtooth hanger attached. Note: measurements provided are estimated outer dimensions, which include both the image and the frame. While we aim to keep sizing consistent, exact dimensions may vary slightly due to differences in print size or production requirements, which may result in a variation in the overall size (up to approximately 2.5cm (1"))
These are individually made so all sizes are approximate
Estimated Image Size (if not cropped) is 19.3cm x 22.5cm (7.6" x 8.9")
Estimated Product Size is 31cm x 36cm (12.2" x 14.2")
