Article: A human foot has an arch underneath, which helps propel the body forward each step, as it acts like a spring. Animals like apes have flat feet, as they grasp the ground with their toes.  The arch is kept in place by ligaments. Also, the big toe on an ape faces outward, perpendicular from the other toes. In a human, all of the toes go in the same direction. In addition, humans bear weight on the whole foot, which is why it is long and narrow. Other animals mainly bear weight on their toes. Other animals walk on all fours, which is why they tend to have larger bones in their arms than humans. Humans don't bear weight on their arms, so the bones don't have to be as large. For instance, an ape or even a horse bears weight on all 4 legs, so the upper limbs are more developed. Because humans walk upright, the thigh bone, otherwise known as the femur, is the longest, strongest bone in the body. On the other hand, the femur will be the same length as other bones in animals. Look for the long bone starting just above the knee and extending up towards the pelvis. The 2 calf bones, the tibia and fibula, are separate in humans. In other animals, these 2 bones are often fused together. Check these bones, and see if they are a single bone or 2 bones to identify animal or human remains.
What is a summary of what this article is about?
Look for the arched foot in humans. Notice smaller upper limbs in humans. Check to see if the femur is the longest bone in the body for humans. Look for separate bones in the calf.