The medical procedure of inserting a catheter into a body cavity, typically to drain urine or introduce fluids.

A stream of electrons or other charged particles, emitted from the cathode in a vacuum tube, used in early studies…

A positively charged ion, formed when an atom or molecule loses one or more electrons.

Toward the tail or posterior end of the body.

Relating to or located near the tail or posterior part of the body.

The tail fin of a fish or other aquatic animal, which helps in propulsion and steering.

A membranous covering, often referring to a thin membrane that sometimes surrounds the head of a newborn or a mass…

To burn or sear tissue, typically for medical purposes to stop bleeding or prevent infection.

A medical procedure involving the use of heat to destroy abnormal tissue or seal off blood vessels.

A hollow space or void, often used in the context of a cavity in the body or in biological systems.