I went to the hospital because the pain in my abdomen persisted.
This insect has a yellow abdomen.
middle part; central section
Extended use referring to the middle or bulging part of an object, such as a ship or a musical instrument. Less common than the anatomical sense.
They load cargo into the middle part of the ship.
My abdomen has been hurting since yesterday, so I went to the hospital.
The doctor examined the patient by pressing on his abdomen with his fingers.
He underwent abdominal surgery last month.
A lump was found on his abdomen during the examination.
腹 is the native, often blunt or idiomatic word for belly, whereas 腹部 is the neutral, technical term used in medical or formal contexts.
Compound of 腹 (belly) and 部 (part, section). The reading ふくぶ is the on'yomi for both kanji.