What is meant by the term 'organ system'?

An organ system is a group of organs working together to perform specific biological functions necessary for maintaining homeostasis and survival of the organism.

Step-by-Step Solution:
Organs are structures made of multiple tissues working together for a specific function
Multiple organs collaborate in a system (e.g., digestive system combines mouth, esophagus, stomach, intestines)
Each organ system has distinct but interconnected roles (e.g., digestive system breaks down food while circulatory system distributes nutrients)
Systems work interdependently to maintain overall organism function

Key Mistake to Avoid: Don't confuse tissue organization (groups of similar cells) with organ systems - systems must contain multiple complete organs working together for a shared purpose.

Quick Tip: Create a mind map showing how different organ systems interact - this helps understand their interdependence and is a common exam question focus.