AACBowed

Bowed
 / baʊ /    [ bou ]  –verb (used without object) http://dictionary.reference.com/browse/bowed
 * Definition:** To bend the knee or body or incline the head, as in reverence, submission, salutation, recognition, or acknowledgment.

Knowing the definition of this word better inhances your understand of the way its used in the poem becauase the author is talking about having her head down and lowerd eyes. Instead of head down she uses "bowed head and lowerd eyes" therefore bowed is another way to say head knee of something bent.

Why would someone have his head bent? What does that suggest? (Consider the power dynamic),