Using 'a' and 'an' articles

[Acc3ss]

The other day, I say a couple of sentences in Spanish. These were ..
No soy hombre. Soy mujer.

Now as I understand, the translation should be:
" No soy un hombre. Soy una mujer. "

If you notice, i've used 'un' and 'una' to specify the article 'a' .. but the english translation given at that place was " No soy hombre. Soy mujer. "

My question is how are we supposed to use articles. And, "Hombre" means "man" or "a man" ??

Hope I make sense.