胃は内臓の一つである。

Sentence Analyzer

内臓 一つ ある

English Translation

The stomach is one of the internal organs.

Furigana

()内臓(ないぞう)(ひと)つである。

Romanji

I wa naizō no hitotsu de aru.

Words

()
stomach; Chinese "stomach" constellation (one of the 28 mansions)
()
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
内臓 (ないぞう)
internal organs; intestines; viscera
()
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
一つ (ひとつ)
one; for one thing; only; (not) even; just (e.g. "just try it")
()
be; is; indicates past or completed action; indicates light imperative
(ある)
a certain ...; some ...

Kanji

Reading: 
Meanings: stomach, paunch, crop, craw
Readings: ナイ、 ダイ、 うち
Meanings: inside, within, between, among, house, home
Readings: ゾウ、 はらわた
Meanings: entrails, viscera, bowels
Readings: イチ、 イツ、 ひと-、 ひと.つ
Meanings: one, one radical (no.1)