Advanced Body Systems (circulation & Respiration) — 4th Grade (ages 9-10)

Graph Patterns – Understanding What Heart Rate Data Tells Us

Reading Heart Rate Graphs – Before and After Exercise

Science and Graphs – Analysing Heart Rate Before and After Sport

Active Bodies – Why Moving More Means a Healthier Heart

Long-Term Fitness – Building a Stronger Heart and Lungs Over Time

Exercise Makes You Stronger – How Physical Activity Helps the Heart and Lungs

Activity and Your Body – How Exercise Changes Breathing and Heart Rate

Measuring Body Rates – Counting Breaths and Heartbeats

Rest vs Active – Comparing Body Rates in Different Situations

Inside the Circulatory System – Blood and Its Pathways

Heart, Lungs, and Blood Vessels – The Body's Transport Network

Mapping the Body's Highway – Major Blood Vessels

Breathing In – How Lungs Bring Oxygen into the Body

Gas Exchange in the Lungs – Oxygen In, Carbon Dioxide Out

How We Breathe – The Mechanics of Respiration

What Blood Carries – Oxygen and Nutrients on the Move

Blood as a Delivery Service – Nutrients and Waste Removal

Blood's Big Job – Keeping Every Cell Alive

The Heart as a Pump – How It Keeps Blood Moving

Your Heart Never Stops – Keeping the Pump Running

The Beating Heart – Chambers and Blood Flow

Food, Air, and Activity – Three Pillars of Cardiovascular Health

Taking Care of Your Heart – Daily Choices for a Lifetime of Health

Healthy Choices – Lifestyle Habits That Support Your Heart and Lungs