He was hiding the fact that he was an illegitimate child.

I'm sorry, but I don't speak Japanese.

I'm a Muslim, so I fast during Ramadan.

I'm Jewish.

Cell biology is the study of the structure and function of cells, which are the basic units of life.

Cytogenetics is a science that studies the structure and function of chromosomes and genes.

Cone cells are the main visual receptors for recognizing colors.

The cytosol is the liquid part inside the cell, and many enzymatic reactions occur here.

Microglia are immune cells in the brain, playing a role in maintaining the health of the nervous system.

Neuroglia play an important supporting role in the nervous system.