Here are the examples categorized by body systems:
Nervous System:
- nerve tissue
- brain
Respiratory System:
- lungs
Circulatory System:
- artery
- heart
Digestive System:
- stomach
- large intestine
Excretory System:
- kidneys
Skeletal/Muscular System:
- connective tissue
- muscle cells
You can drag and drop the items into the appropriate categories based on the classifications provided above.