What is abdominal cavity?

the abdominal cavity is set below the diaphragm and above the pelvic cavity.

it consists of most of the digestive organs such as the stomach, liver, gallbladder, intestines (part of the colon resides in the pelvic cavity), spleen

Basically a space that contains some of the following items in your body:

1.) Colon

2.) Liver

Those are just some of the big things that your cavity holds!