Allows blood to follow in many directions, keeps the heartbeat in rhythm
Prevents back flow, keeps blood flowing in different directions
Keep blood following in a single direction and prevent backflow
Stops the heart from slowing, prevents backflow
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2. Explain the functions of the respiratory system
Delivers gaseous exchange to the lungs surfaces and allows oxygen to be diffused into the skin to allow it to be transported to cells
Delivers air to the gaseous exchange in the lungs surfaces, allows oxygen to diffuse into the blood so it can be transported to cells, to allow carbon dioxide to diffuse from blood to air to be exhaled
To allow carbon dioxide to diffuse from air to blood to be exhaled, to allow oxygen to diffuse into the blood to transport to tissues, delivers gaseous exchange
3. What is ventilation
Movement of air from low pressure to high pressure areas
Movement of air from high pressure to low pressure areas
Movement of air in and out the body
Movement of air around the body
4. What does the respiratory system consist of?
Upper and lower airways, lungs and pulmonary blood vessels
Upper and lower airways, heart and pulmonary blood vessels
Lower airways, lungs and bronchioles
Lungs, trachea and bronchioles
5. What does the cardiovascular system consist of?
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