Word: aortic
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...normal air, breathing is controlled by the respiratory centre in the medulla, which is part of the brain. But this centre is itself enfeebled by oxygen lack, passes control to secondary centres, the carotid bodies in the neck and the aortic body near the heart. Lack of oxygen stimulates instead of enfeebling these secondary centres, and they send out stronger and stronger impulses to the respiration muscles. If the lungs suddenly get more oxygen, the carotid and aortic bodies rest, turn back control to the centre in the medulla. But that stupefied centre may not be in shape to take...
When his heart contracts it throws a load of blood forward toward his head. "For the same reason that a discharged gun kicks one in the shoulder," said Dr. Starr, "the recoil throws the body feet-ward." An instant later, when the blood strikes the aortic arch (curve in large heart artery), "[the blood's] headward movement is arrested, creating an impact which throws the body and the table headward...
...ZOOLOGICAL CLUB. Brief Report on Bermuda Biological Station in 1904. Professor Mark. Shoal-water Deposits of Bermuda. Mr. H. B. Bigelow.--The Fifth Aortic Arch in some Mammals. Mr. H. Lehmann. Room 1, fourth floor, Zoological Museum...
...ZOOLOGICAL CLUB. Brief Report on Bermuda Biological Station in 1904. Professor Mark. Shoal-water Deposits of Bermuda. Mr. H. B. Bigelow.--The Fifth Aortic Arch in some Mammals. Mr. H. Lehmann. Room 1, fourth floor, Zoological Museunt...