| 单词 | semilunar valve |
| 例句 | After blood passes through the pulmonary arteries, the right semilunar valves close preventing the blood from flowing backwards into the right ventricle. Biology for AP Courses 2022-06-09T00:00:00Z Blood is pumped from the heart, pushing open the pulmonary and aortic semilunar valves. Anatomy and Physiology 2013-06-19T00:00:00Z The openings of the arteries behind the semilunar valves may be very small. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z L, The semilunar valves of the pulmonary artery. A Treatise on Anatomy, Physiology, and Hygiene (Revised Edition) The semilunar valves of the pulmonary artery had their bases slightly ossified, and the remaining part thickened. Cases of Organic Diseases of the Heart Both the aortic and the pulmonary valves are semilunar valves. Biology for AP Courses 2022-06-09T00:00:00Z The semilunar valves close to prevent backflow into the heart. Anatomy and Physiology 2013-06-19T00:00:00Z Just under the mucous membrane covering the anal columns and semilunar valves is the fatty tissue forming a bed upon which the mucous membrane rests. Intestinal Ills Chronic Constipation, Indigestion, Autogenetic Poisons, Diarrhea, Piles, Etc. Also Auto-Infection, Auto-Intoxication, Anemia, Emaciation, Etc. Due to Proctitis and Colitis The thoracic duct is equal in diameter to a goose-quill, and, at its termination, is provided with a pair of semilunar valves, which prevent the admission of venous blood into its cylinder. A Treatise on Anatomy, Physiology, and Hygiene (Revised Edition) The tricuspid valves had lost their smoothness and transparency; the semilunar valves of the pulmonary artery were cartilaginous at their bases. Cases of Organic Diseases of the Heart The right semilunar valve is situated around the opening of the right ventricle into the pulmonary artery. Physiology and Hygiene for Secondary Schools When ventricular pressure rises above the pressure in the two major arteries, blood pushes open the two semilunar valves and moves into the pulmonary trunk and aorta in the ventricular ejection phase. Anatomy and Physiology 2013-06-19T00:00:00Z The semilunar valves surround the opening from the left ventricle into the aorta and keep the blood from flowing back. Mother's Remedies Over One Thousand Tried and Tested Remedies from Mothers of the United States and Canada There is scarcely a patient but he knows the exact state of their thoracic viscera, and he talks of enlarged semilunar valves, and thickened ventricles with an air of alarming confidence. Punch, or the London Charivari, Volume 1, October 16, 1841 The semilunar valves of the aorta were lessened in size, and somewhat thickened. Cases of Organic Diseases of the Heart The left semilunar valve is around the opening of the left ventricle into the aorta, and is similar in all respects to the right semilunar valve. Physiology and Hygiene for Secondary Schools At the base of the pulmonary trunk is the pulmonary semilunar valve, which prevents backflow of blood into the right ventricle during ventricular diastole. Anatomy and Physiology 2013-06-19T00:00:00Z Pulmonary semilunar valves guard the orifice of the pulmonary artery, keeping the blood from flowing back into the right ventricle. Mother's Remedies Over One Thousand Tried and Tested Remedies from Mothers of the United States and Canada On the commencement of the diastole of the ventricle, the semilunar valves are closed, and the aorta recoils by its elasticity so as to force part of its contents into the vessels farther onwards. The Gutenberg Webster's Unabridged Dictionary Section P and Q The semilunar valves of the pulmonary artery and aorta were unusually small, and their bases cartilaginous. Cases of Organic Diseases of the Heart After tying or plugging up the holes in the sides of the artery, pour water into the small end and observe the closing of the semilunar valve. Physiology and Hygiene for Secondary Schools At the base of the aorta is the aortic semilunar valve that prevents backflow of blood into the left ventricle while the heart is relaxing. Anatomy and Physiology 2013-06-19T00:00:00Z Continue to lay open the ventricle towards the pulmonary artery until the semilunar valves come into view. A Practical Physiology Thence it is driven past the semilunar valves, through the pulmonary artery, to the lungs. Hygienic Physiology : with Special Reference to the Use of Alcoholic Drinks and Narcotics The tricuspid valves and the semilunar valves of the pulmonary artery had lost their healthy transparency, but were not otherwise diseased. Cases of Organic Diseases of the Heart The second sound is due to the closing of the semilunar valves. Physiology and Hygiene for Secondary Schools The two semilunar valves, the pulmonary and aortic valves, are closed, preventing backflow of blood into the right and left ventricles from the pulmonary trunk on the right and the aorta on the left. Anatomy and Physiology 2013-06-19T00:00:00Z The pulmonary artery may now be opened from above so as to display the upper surfaces of the semilunar valves. A Practical Physiology There are, as everyone knows, three sigmoid or semilunar valves situated at the orifice of the pulmonary artery, which effectually prevent the blood sent into the vessel from returning into the cavity of the heart. The Harvard Classics Volume 38 Scientific Papers (Physiology, Medicine, Surgery, Geology) In an irregularly acting heart the systolic pressure may vary greatly, from 10 to 20 mm. or more, and a ventricular contraction may not be of sufficient power to open the semilunar valves. Disturbances of the Heart The valves at the openings that lead to the pulmonary trunk and aorta are known generically as semilunar valves. Anatomy and Physiology 2013-06-19T00:00:00Z The atrioventricular valves form between weeks five and eight, and the semilunar valves form between weeks five and nine. Anatomy and Physiology 2013-06-19T00:00:00Z Cut open the aorta, and notice the form of the semilunar valves. A Practical Physiology Any condition that increases resistance requires a greater afterload to force open the semilunar valves and pump the blood. Anatomy and Physiology 2013-06-19T00:00:00Z The semilunar valves form between weeks five and nine. Anatomy and Physiology 2013-06-19T00:00:00Z There are three dilations in the wall of the aorta just superior to the aortic semilunar valve. Anatomy and Physiology 2013-06-19T00:00:00Z The pulmonary valve is located at the base of the pulmonary trunk, and the left semilunar valve is located at the base of the aorta. Anatomy and Physiology 2013-06-19T00:00:00Z The openings from the ventricles into these vessels are guarded by the semilunar valves. A Practical Physiology As ventricular pressure drops, there is a tendency for blood to flow back into the atria from the major arteries, producing the dicrotic notch in the ECG and closing the two semilunar valves. Anatomy and Physiology 2013-06-19T00:00:00Z The second heart sound, S2 or dub, occurs when the semilunar valves close. Anatomy and Physiology 2013-06-19T00:00:00Z The mitral valve instantly closes and blocks the passage backward into the auricle; the blood, having no other way open, is forced through the semilunar valves into the aorta. A Practical Physiology As pressure in the ventricles rises above two major arteries, blood pushes open the two semilunar valves and moves into the pulmonary trunk and aorta in the ventricular ejection phase. Anatomy and Physiology 2013-06-19T00:00:00Z The blood is now forced through the open semilunar valves into the pulmonary artery. A Practical Physiology The muscular substance of the heart itself is supplied with nourishment by two little arteries called the coronary arteries, which start from the aorta just above two of the semilunar valves. A Practical Physiology The second sound is, without doubt, caused by the sudden closure of the semilunar valves of the pulmonary artery and the aorta, at the moment when the contraction of the ventricles is completed. A Practical Physiology The ventricular cavity should now be opened up as far as the aorta, and the semilunar valves examined. A Practical Physiology |
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