This old radio uses a cold-cathode tube.

This old radio uses a pentode.

Inside the ear, there are semicircular canals to maintain balance.

This diode only allows current to flow in one direction.

He is mindful of healthy eating and exercise to reduce the risk of cardiovascular disease.

The urachus is a structure that exists during the fetal period, connecting the bladder and the navel.

She was diagnosed with salpingitis.

This old radio uses a vacuum fluorescent display.

We should always remember the power of Kannon in difficult times.

He learned speed reading to increase his reading speed.