Hard parts such as bones, teeth, and shells are most likely to become fossilized as they have a higher chance of being preserved over time. Soft tissues like muscles and organs usually decay before fossilization can occur.
The skeleton
They have a hart
The least body part of a dinosaur to be likely as a fossil are the muscles.
skin
yes
Bones and feathers.
The part of the body that is most likely to shut down in times of extreme stress is the digestive system.
The most usually fossilized parts of organisms are bones and shells. These are least likely to rot or wear away before they are buried and mineralised. In rare instances the soft parts of the bodies are preserved and are normally shown as thin films on the rock surface.
All parts of plants have been fossilized.
The diaphragm
every part mainly