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Unit 3 Lesson 4 Breathe In, Breathe Out & Beat It
| Question | Answer |
|---|---|
| Body system that brings in oxygen that the body needs and releases carbon dioxide | Respiratory System |
| The body's waste gas | carbon dioxide |
| The main organs of the respiratory system that are spongy and expand to fill with air | lungs |
| The tube in your throat that branches into two smaller tubes | trachea |
| The smaller tubes that the trachea branches into | bronchi |
| Tiny sacs at the end of each bronchiole | alveoli |
| Muscular organ that pumps blood throughout your body | heart |
| Clear liquid that makes up blood and carries nutrients and blood cells throughout the body | plasma |
| Thick blood vessels that move blood carrying oxygen away from the heart and to the body | arteries |
| Blood vessels that move blood carrying waste material back to the heart and lungs so the process can begin again | Veins |
| Connect arteries and veins and have very thin walls that allow oxygen and nutrients to pass through | capillaries |
| Body system made up of the heart, vessels, and blood | Circulatory System |
| Blood cells that carry oxygen throughout your body | red blood cells |
| Blood cells that fight disease | white blood cells |
| Stop bleeding by sticking together and forming clots | platelets |