Coordination

Key terms

Homeostasis: maintenance of a stable equilibrium in conditions inside the body

Need for coordination

• Cells specialised to perform specific functions

• Few body systems work in isolation

• Dependent on other cells and systems

Homeostasis

• Functions of organs coordinated to maintain constant internal environment

Cell signalling

• Nervous and hormonal systems coordinate activities

• Relies on cell communication

• Occurs through cells releasing chemicals

• Have effect on target cells

• Transfer signals locally or large distances

Coordination in plants

• Respond to internal and external changes

• Use plant hormones