The chief muscular mass, arising from the sternum in the shape of a U, is the pectoralis muscle; its fibres converge into a strong tendon, which is inserted upon the greater tubercle and upper crest of the humerus, which it depresses and slightly rotates forwards during the downstroke. [Please select]
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--Moves femur posteriorly and rotates it in this direction; moves tail laterally and depresses it. [Please select]
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, held that the earth revolves about the sun as a fixed centre, and rotates on its own axis. [Please select]
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In the upper part, the radius rotates on itself; while below, it rotates around the ulna. [Please select]
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This muscle flexes and abducts the humerus, and also rotates it outwards. [Please select]
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It also rotates it outwards in the animals in which the articulation permits this latter movement. [Please select]
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A rectangular wooden frame with suitable bearings rotates about this shaft. [Please select]
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The screw end rotates in a socket with a thread of equal pitch cut in it. [Please select]
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Biot, the camphor formed by the oil of lemons does not exercise any action on polarized light, whilst the oil of lemons itself rotates a ray to the right. [Please select]
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] This simple apparatus enables us to illustrate another law of great practical importance, namely, that when a mirror rotates, the angular velocity of a beam reflected from it is twice that of the reflecting mirror. [Please select]
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