Flesh radical on the left — the side-form of
肉 (meat), visually identical to
月 (moon) in modern type. Marks
肺 as a body-organ noun: same radical anchors
肝 (liver),
肾 (kidney),
胃 (stomach),
脑 (brain),
脏 (organ). Whenever you see this
月-shape on the LEFT of a body part, read it as flesh, not moon.