Intrinsic Factor

A chemical, Mucoprotein, secreted in the Stomach and needed for Vitamin B12 absorption.

Intravascular Fluid

The Body Fluid inside Blood Vessels.

Intrauterine Devices (IUD)

Plastic or metal pieces, formed into different shapes, that are introduced into the Uterine Cavity to prevent Conception.

Intrapulmonary Bronchi

Bronchi that lie inside the Lungs.

Intracellular Fluid

Body fluid found inside the Cells.

Intervertebral Disk

The Disk between two Vertebral Bones.

Interval Training

Training in which high-intensity exercise is alternated with short rest.

Interstitial Fluid

Fluid that surrounds the Cells, lies outside the Vascular Compartment.