C3.1 Integration of body systems (SL and HL). IB Biology.

• IB Biology
• Secondary Education

C3.1 Integration of body systems

Unit overview - What is this unit about? 

This unit explores how the complex functions of multicellular organisms emerge from the coordination and integration of various systems. Students examine how cells, tissues, organs, and organ systems form a hierarchical structure that allows organisms to maintain internal balance, respond to stimuli, and carry out essential life processes efficiently.

C3.1.1—System integration

Guide questions: What is a system? What is integration in biology? Why is system integration necessary or important?

Biological systems are extremely complex and there is interaction at every level, from the molecular level through the ecosystem level. Multicellular organisms have numerous interaction parts allowing for connection and communication between the different parts. Interaction between whole or parts of the system is what system integration is about. This is a necessary process in living systems. Coordination is needed for component parts of a system to

collectively perform an overall function. System integration promotes coordination!

 

Why is system integration necessary? Select all that applies.

Communication

Independence

Application

Coordination

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