血が彼の傷口から流れた。

blood; consanguinity

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

he; him; his; boyfriend

indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question

(opening of) a wound; (mouth of a) wound; cut

from (e.g. time, place, numerical quantity); since; from (originator); by; because; since; out of (constituent, part); through (e.g. window, vestibule); after; since

to stream; to flow (liquid, time, etc.); to run (ink); to be washed away; to be carried; to drift; to float (e.g. clouds); to wander; to stray; to sweep (e.g. rumour, fire); to spread; to circulate; to be heard (e.g. music); to be played; to lapse (e.g. into indolence, despair); to pass; to elapse; to be transmitted; to be called off; to be forfeited; to disappear; to be removed