. Elementary anatomy and physiology : for colleges, academies, and other schools . sudden bend inwards, forming the neck of the bone, the ter- mination of which is hemispherical, in order to articulate with the innominatum, forming the ball and socket joint. Its lower extremity has two large condyles or processes, for the purpose of giving attachments to the ligaments of the knee, and articulating with the tibia. 140. The Patella —Or Knee Pan is the Fig. 81. largest sesamoid bone in the body. It arti- culates with the femur, and lies imbedded in the extensor tendon of the thigh. The chief valu
. Elementary anatomy and physiology : for colleges, academies, and other schools . sudden bend inwards, forming the neck of the bone, the ter- mination of which is hemispherical, in order to articulate with the innominatum, forming the ball and socket joint. Its lower extremity has two large condyles or processes, for the purpose of giving attachments to the ligaments of the knee, and articulating with the tibia. 140. The Patella —Or Knee Pan is the Fig. 81. largest sesamoid bone in the body. It arti- culates with the femur, and lies imbedded in the extensor tendon of the thigh. The chief value of this bone is to give a change of direction to the force of the muscles which move the lower bones of this extremity we are now describing. Patella in Latin signi- An AnteriorTie^ of fies a "plate," and hence the name of this the Patella. 1,2, sur- _ . , , ,. face for the Quadriceps bone, because 01 its rounded outline. Femoris Tendon. 3, Lower Extremity and 141. The Tibia.—That portion of the Point of origin of the . - , , , , . , Ligamentuin Patelke. lower extremity below the knee, which is properly the leg, has two bones called crural for its frame- work. The largest of these is the Tibia (Fig. 82, p. 64.) It is somewhat triangular in its general outline, having its upper extremity depressed in two places for the reception of the condyles of the femur. Besides the femur above, it articulates with the fibula and astragalus below. The name tibia is given to the bone, since it resembles, though remotely, the ancient Phrygian flute. 142. The Fibula.—The Fibula is the other bone of the leg, long and slender. It articulates at each end with the tibia. The meaning of the Latin fibula, is a "pin," or fastening of a clasp, owing to its slender form. The lower extremity of this bone, and also that of the tibia, forms what 140. Describe the Patella or Knee Pan. In what is it imbedded? 141. What is the Leg? What are the two bones of it? Which is the largest
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