the.com/humerus

The bone behind your bad jokes, snapped most often by reaching backward to break a fall.

means The humerus is the long bone of the upper arm, running from your shoulder to your elbow.

from Straight from Latin humerus (also spelled umerus), meaning 'shoulder' or 'upper arm.' The pun with 'humorous' is pure English coincidence — the comedy lives entirely in the funny bone at the elbow, where the ulnar nerve gets pinched against the bone's end and sends that tingling jolt down your arm. Latin humerus and 'humor' (from Latin umor, 'moisture,' as in the bodily humors) are unrelated despite sounding like twins.

name origin
From Latin for shoulder, not the funny bone
funny bone
The tingle is the ulnar nerve, not bone
strength
Longest, largest bone in the human arm
spiral fracture
Arm-wrestling can twist it clean in two
three nerves
It cradles radial, ulnar, and median nerves
for instance

lucy's humerus — 3.2 million year old fossil arm bone of australopithecus afarensis found in ethiopia, 1974

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