"He has no significant symptoms related to any of his organ systems."

The organ systems we find in most animals contain one heart and two lungs.

Information on other organ systems is absent, and no further specimens are available for study.

Almost any of the body's organ systems may be affected.

When there are three or more organs it is called an organ system.

Mammals such as humans have a variety of organ systems.

"We think that certain organ systems are weak and live with those expectations."

Although the steps are consistent across organ systems, the order may vary.

One group of problems is not specific to any organ system.

As a result they are at risk for numerous medical problems affecting different organ systems.