. Human physiology. Fig. 67. -Tapping the Toe on theGround. muscles in the front of the neck contract, the back of the head israised. So that the face and the back of the head alternatelyrepresent the power and the weight. (2) Lift one foot, and then, by tapping the toe on the ground,we use the foot as a lever of the first order. In this case thepower is applied behind by the contraction of the muscles of thecalf, the fulcrum is at the ankle, and the ground offers the resist-ance. (3) The motion of the body on the hip is another hip-joints form the fulcrum ; and the contractio
. Human physiology. Fig. 67. -Tapping the Toe on theGround. muscles in the front of the neck contract, the back of the head israised. So that the face and the back of the head alternatelyrepresent the power and the weight. (2) Lift one foot, and then, by tapping the toe on the ground,we use the foot as a lever of the first order. In this case thepower is applied behind by the contraction of the muscles of thecalf, the fulcrum is at the ankle, and the ground offers the resist-ance. (3) The motion of the body on the hip is another hip-joints form the fulcrum ; and the contraction of themuscles connecting the pelvis with the bones of the leg providethe power. In this case the power (and the weight) may bealternately in front and behind. THE LEVERS OF THE BODY Levers of the second order :— 57 (i) Illustrated by lifting one leg off the ground. In this casethe hip-joint is the fulcrum, the leg is the weight to be moved, and.
Size: 1512px × 1653px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisherlondon, booksubject
