UNIT B: Cells and Systems

Unit Checklist

  Unit B: Key Ideas

Focus On: Cells and Systems

This unit has four sections dedicated to helping you understand the basics of cells and systems. Each section has a key idea indicated by its title, and each section is divided into lessons. Click each key idea to view the lesson titles and some key questions you will investigate.

 
Section 1 Key Idea: The characteristics of living things and the functions they perform.

Lesson B1: What is a Living Thing?
Key Question – What characteristics must an object have, to be alive?

Lesson B2: Structures and Functions
Key Question – What adaptations help keep different organisms alive?
 
Lesson B3: Cells Working Together as Organs
Key Question – How do organ systems work together to perform important functions?



Section 2 Key Idea: Living things depend on the function of cells.

Lesson B4: Looking at Cells
Key Question – What technologies do we use to observe tiny cells?

Lesson B5: Studying Cells
Key Question – What structures are found inside living cells?

Lesson B6: Unicellular and Multicellular Organisms
Key Question – What are the differences between organisms with one cell and organisms with many cells?

Lesson B7: Specialized Cells and Tissues
Key Question – What are the special roles of different body cells?

Lesson B8: The Effect of Diffusion and Osmosis on Cells
Key Question – How do substances move in and out of cells?



Section 3 Key Idea: Interacting systems of cells are needed for healthy human functions.

Lesson B9: Human Systems: Digestion
Key Question – How does the human body ingest and absorb nutrients?

Lesson B10: Human Systems: Respiration
Key Question – How do gases move in and out of the human body?

Lesson B11: Human Systems: Circulation
Key Question – How do nutrients travel to all parts of the human body?

Lesson B12: Human Systems: Excretion
Key Question – How do wastes exit the human body?

Lesson B13: Human Systems: Regulation and Communication
Key Question – How does the human body react to stimuli?


Section 4 Key Idea: Medical research provides insight into healthy human functions.

Lesson B14: Researching Systems and Disease
Key Question – How has medical research improved human health?

Lesson B15: Diseases and Treatments
Key Question – What are some examples of diseases that negatively affect human health?

Lesson B16: Active Lifestyles and Health
Key Question – How do exercise and good nutrition help people stay healthy?