He is a master of martial arts.

What is this powder?

The ophthalmologist said there was something wrong with my vitreous body.

The doctor said that his vision loss was due to a problem with the vitreous body.

The study of chromosomes is an important part of cytology.

He wrote his name in block letters.

His vision is declining due to damage to the rods.

Somatic cells are part of the cells that make up an organism's body.

This dielectric conducts electricity very well.

This book is written in Roman type.