ovaries
organelles
organelles
Those are called organelles.
Organelles.
"reflexes"
It is called The Omentum. It is a fold of THE Peritonium extending from the stomach to adjacent abdominal organs.
The difference between an Angiosperm and a Gymnosperm is that Angiosperms are flowering plants while Gymnosperms are not. A. include plants that use flowers to reproduce. More information on this topic can be researched online or in a Biology book. I strongly recommend Dale Layman's Biology Demystified for more info. An angiosperm also forms seeds inside a protective chamber called an ovary and a gymnosperm bears naked seeds (no ovary).
The heart is an organ; it contains no other organs within it.
the numerous small structures that function like organs in cell are called
Prokaryotic cells do contain cellular organelles. The organelles however are not membrane- bound and are free floating within the cell.
I'm not sure how to interpret the question.The entire is called the Digestive System and is complete, fairly complex, set of separate organs joined by various ducts of their own, and the Circulatory System.Some of these organs, especially the intestines, are held within a membranous bag called the Peritoneum - if that's the cover you mean.
Visceral fat protects the abdominal organs deep within the body.