Which bone is indicated by the arrow in the diagram below? A diagram showing the appendicular skeleton. An arrow points to the bone in the lower arm closest to the body. humerus ulna radius clavicle

ulna

Explanation:

The ulna runs parallel to the radius in the lower arm.

The ulna is in line with your pinky finger and is the bone closest to the body. The radius is in line with your thumb and allows you to rotate your wrist.

Hope that helps.

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all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex