Tendon the Achilles tendon stretches as the ankle joint dorsiflexes. During the last portion of the stride, as the foot plantar-flexes (pointing the toes down), the stored elastic energy is released. Furthermore, because the tendon stretches, the muscle is able to function with less or even no change in length, allowing the muscle to generate greater force. The mechanical properties of the tendon are dependent on the collagen fiber diameter and orientation. The collagen fibrils are parallel to each other and closely packed, but show a wave-like appearance due to planar undulations, or crimps, on a scale of several micrometers. In
What Strong Fences Make What Strong Fences Make What Strong Fences Make is a 2009 play by Israel Horovitz. Horovitz told an interviewer that he wrote "What Strong Fences Make" because "another voice needed to be heard" in the wake of Caryl Churchill's play "Seven Jewish Children", which he argues "offensive, distorted and manipulative". Horovitz has offered to allow any theater that wishes to produce "What Strong Fences Make" free of royalties, provided that a collection is taken up following all performances for the benefit of ONE Family Fund, a charity that assists children wounded in attacks on Israel. The playwright has made the