A manual of anatomy . ted as follows: The pulmonary valve is placed horizontallybeneath the middle of the third left chondrosternal junction. Theaortic valve is below this and toward the midUne and at an mitral valve is opposite the third left interspace and nearlyhorizontal, while the tricuspid valve is below this near the midlineand at an angle, shghtly overlapping the mitral valve. These areasindicate the position of the valves but do not indicate the regionswhere the valve sounds are best heard. These latter are called thepuncta maxima and are as follows: THE ARTERIES 223 1. Pulm
A manual of anatomy . ted as follows: The pulmonary valve is placed horizontallybeneath the middle of the third left chondrosternal junction. Theaortic valve is below this and toward the midUne and at an mitral valve is opposite the third left interspace and nearlyhorizontal, while the tricuspid valve is below this near the midlineand at an angle, shghtly overlapping the mitral valve. These areasindicate the position of the valves but do not indicate the regionswhere the valve sounds are best heard. These latter are called thepuncta maxima and are as follows: THE ARTERIES 223 1. Pulmonary pundum maximum {p. m.) is at the sternal end ofthe second left intercostal space. 2. Aortic p. m. is at the second right costal cartilage. 3. Antral p. m. is just above the area of the apex point. 4. Tricuspid p. m. is at the sternal ends of the fifth and sixthcostal cartilages. That portion of the heart that Hes immediately beneath the ven-tral thoracic wall and separated from it by only the pericardium andr -,. Fig. 174.—Diagram of the heart and valves in relation to the skeleton of the ventralthoracic wall. PC, Superior vena cava; RA, right atrium; RV, right ventricle; LA, leftatrium; LV, left ventricle; P, pulmonary valve; A, aortic valve; M, mitral valve; T, tn-cuspid valve. pleurae is called the area of superficial cardiac dulness and is chieflyventricular; the remainder is overlapped bv the lungs and gives thedeep cardiac dulness. THE ARTERIES The circulations are the pulmonary and systemic; the systemic isdivided into general systemic and portal. The pulmonary circulation comprises the right ventricle, the pul-monary aorta and the pulmonary arteries, the lungs, pulmonaryveins and the left atrium. 224 THE BLOOD-VASCULAR SYSTEM The pulmonary aorta, or artery (arteria pulmonalis), leaves theright ventricle at the summit of the conus arteriosus. The vesselis about 2 inches (5 cm.) long and iM inches (30 mm.) in passes upward (cephalad) and dorsally and u
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecthumananatomy, bookyea
