> In the human body, the forearm consists of the radius and which other bone?And the answer: ulna.The forearm is made up of two bones, the ulna and the radius, both of whichextend from your elbow to your wrist. The ulna is located on the pinky side ofyour arm, while the radius is on your thumb side.Photo credit: Athikhun.suw[https://commons.wikimedia.org/wiki/User:Athikhun.suw].Sing with us now: "The chest bone's connected to the ... arm bones!" Thehumerus, to be exact. The human arm is made from three long bones – the humerus,radius, and ulna – that are linked at the elbow by a hinge joint. The radius andulna, connecting to opposite ends of your hand, work together to create thewrist (formally known as the carpus). The wrist itself is quite an importantjoint, as major arteries come closer to the surface than any other place in yourbody. For this reason, the wrist is the best place to check your pulse.With the help of the humerus bone, the radius and ulna also create the elbowjoint. Due to their helpful mobility and lightweight nature, the radius and ulnatend to suffer fractures and breaks more than many other larger bones in thebody. However, they are still capable of bearing weight. The radius and ulnawork together to provide leverage for lifting and rotation for manipulation ofobjects (you can thank your radius and ulna for your fast typing abilities).When babies start crawling, the radius also can help to provide mobility andsupport for the rest of their growing bones.In animals, the radius and ulna can actually be weight-bearing bones. Infour-legged animals, the radius supports weight while the ulna helps with jointmobility. In horses and oxen, the radius passes straight down the forearm toexpand at the wrist, while in dogs, the radius passes diagonally from the elbowjoint to the foot. Learn more about the physiology of the radius and ulna below.