He did his best to protect me from danger.

Insects are an important part of the natural world.

He is world-famous as an entomologist.

He is an expert in entomology, especially knowledgeable about butterflies.

The human endoskeleton is made up of 206 bones.

Skeletal muscles play an important role in moving our bodies.

The cytoskeleton plays a crucial role in maintaining the shape of the cell.

He is playing outside.

In addition to keys and wallets, there are many small items in my bag to take outside.

He is playing outside the house.