Wing dam in a man-made river bed. A wing dam or wing dike is a manmade barrier that, unlike a conventional dam, only extends partway into a river. These structures force water into a fast-moving center channel which reduces the rate of sediment accumulation while slowing water flow near the riverbanks.
Each foot is made up of 28 bones, 30 joints and more than 100 muscles, tendons and ligaments, all of which work together to provide support, balance and mobility. Here's a look at the main structures of the feet. Bones. Nearly one-fourth of the body's bones are in our feet.The bones of the feet are:1  Talus â the bone on top of the foot that forms a joint with the two bones of the lower leg, the tibia and fibula. 2  Calcaneus â the largest bone of the foot, which lies beneath the talus to form the heel bone.ones. Nearly one-fourth of the body's bones are in our feet. The bones of the feet are: 1  Talus â the bone on top of the foot that forms a joint with the two bones of the lower leg, the tibia and fibula. 2  Calcaneus â the largest bone of the foot, which lies beneath the talus to form the heel bone.
The knee joint bears most of the weight of the body. When weâre sitting, the tibia and femur barely touch; standing they lock together to form a stable unit. Letâs look at a normal knee joint to understand how the parts (anatomy) work together (function) and how knee problems can occur.he knee joint bears most of the weight of the body. When weâre sitting, the tibia and femur barely touch; standing they lock together to form a stable unit. Letâs look at a normal knee joint to understand how the parts (anatomy) work together (function) and how knee problems can occur.