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.

The vas deferens is a part of the male reproductive system and has the role of transporting sperm.

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.

He decided to have a vasectomy.