Tissues, organs, organ systems, and how specialised cells work together.
From cells to organisms
Types of tissues in animals and plants
Structure and function of the breathing system
Breaking down and absorbing nutrients
Transporting substances around the body
Test your knowledge of Lessons 1-5
Removing waste products
Communication and control
Hormones and chemical messengers
Defending against pathogens
Xylem, phloem, and transpiration
Test your knowledge of Lessons 6-10