1 Section 30-1 “Respiratory & Circulatory Systems” Write everything that is underlined
2 KEY CONCEPT The respiratory and circulatory systems bring oxygen and nutrients to the cells
3 The circulatory system transports blood and other materials I. The respiratory and circulatory systems work together to maintain homeostasisThe circulatory system transports blood and other materialsbrings supplies to cellscarries away wastesseparates oxygen-poor and oxygen-rich blood
4 The respiratory system is where gas exchange occurs picks up oxygen from inhaled airexpels (gets rid of) carbon dioxide and waternosesinusmouthepiglottistrachealungs
5 The respiratory system moves gases into and out of the blood The lungs contain the bronchi, bronchioles, and alveoliMillions of alveoli give the lungs a huge surface areaThe alveoli absorb oxygen from the air you inhalealveolibronchiole
6 Air flows from areas of high pressure to low pressure Breathing involves the diaphragm and muscles of the rib cageAir flows from areas of high pressure to low pressureAir inhaled.Muscles contract andrib cage expands.Diaphragm flattensand moves downward.Air exhaled.Muscles andrib cage relax.Diaphragm relaxesand rises.
7 II. The circulatory system moves blood to all parts of the body The system includes the heart, arteries, veins, and capillariesheart pumps blood throughout bodyarteries move blood away from heart (Artery Away)veins move blood back to heartcapillaries get blood to and from the cellsveinsarteries
8 They are working together The respiratory system exchanges oxygen and carbon dioxide with the blood inside the body and the outside airThe circulatory system moves that blood around the body and back to the lungsThey are working together