This lesson explains the circulatory system's structure and main functions, and shows how it integrates with every other organ system to maintain homeostasis. It includes real-world connections (history, technology, careers), common misconceptions, review questions, and an activity.
Circulatory System — The Body's Highways, Delivery Vans, and Emergency Squad (Integration Time) "Think of your body as a buzzing city: the circulatory system is the main road network. If blood were traffic, it would carry packages, passengers, messages, cops, and sometimes pizza — all at ...
Quick refresher: What is the circulatory system? Main job: Transport materials (oxygen, nutrients, hormones, waste), regulate temperature and pH, and protect the body (immune cells, clotting). Major parts: Heart (pump), blood (fluid + cells), blood vessels (arteries, veins, capillaries), and th...
How the circulatory system integrates with other organ systems Below: the coolest tag-team moments between circulatory and each system.
1) Respiratory system — the oxygen swap meet Lungs load O2 into blood and remove CO2. Red blood cells deliver oxygen to tissues; CO2 returns to lungs. Example: Run up stairs → muscles use more O2 → blood brings more O2 thanks to faster heart rate and deeper breathing. 2) Digestive system — ...
5) Immune system — mobile SWAT units White blood cells travel through blood to infection sites. Circulatory system spreads antibodies, brings clotting factors to stop bleeding. 6) Nervous system — the control tower Brain monitors blood pressure, composition (CO2, pH), and signals the heart ...
Table: Snapshot of interactions Other System Circulatory Role Example of Integration Respiratory Gas exchange transport O2 in lungs → O2 to muscles during exercise Digestive Nutrient transport Glucose from gut → delivered to cells or liver Excretory Waste removal, fluid bal...
Other System Circulatory Role Example of Integration Respiratory Gas exchange transport O2 in lungs → O2 to muscles during exercise Digestive Nutrient transport Glucose from gut → delivered to cells or liver Excretory Waste removal, fluid balance Kidneys filter blood → cont...
Real-world tech, history, and careers — tiny tour Historical shout-out: William Harvey (1600s) described blood circulation. Revolutionary because people before him thought blood just sloshed around. Tech you might have heard of: pacemakers , stents , artificial hearts , echocardiograms , angiog...
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