SHARED STUDY GUIDE
Chapter 1
ave you ever wondered how your body gets the energy it needs to run, play, and even think? It all starts with the cardiovascular system, a superhighway that delivers life-giving oxygen and nutrients to every corner of you!
Think of it as your body's delivery service. The cardiovascular system, also known as the circulatory system, is made up of the heart (the pump), blood vessels (the roads), and blood (the cargo).
The cardiovascular system's main job is to transport oxygen, nutrients, hormones, and waste products throughout the body.
Let's break down the main players:
Heart
The muscular pump that drives blood circulation.
Blood Vessels
The network of tubes that carry blood.
Blood
The fluid that carries oxygen and nutrients.
The cardiovascular system has two main routes:
Pulmonary Circuit
Heart to lungs, back to heart (oxygen pickup).
Systemic Circuit
Heart to body, back to heart (oxygen delivery).
REMEMBER
Arteries carry oxygen-rich blood away from the heart. Veins return oxygen-poor blood to the heart.
* Exercise strengthens your heart.
* Healthy diet keeps blood vessels clear.
* Staying hydrated helps blood flow easily.
Exercise improves heart strength.
Diet impacts vessel health.
Hydration aids blood flow.
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