Multiple choice How many bones are in the left arm including the hand? 25 30 35 None of the answers Reveal answer Fill a bubble to check yourself B Correct answer Explanation The human arm consists of the humerus, radius, ulna, 8 carpals, 5 metacarpals, and 14 phalanges. Summing these bones (1+1+1+8+5+14) equals 30 bones.