This concept consists of two videos discussing physical activity and exercise. Each video link is followed by a set of questions related to the video. Read the questions prior to watching the video. Think about the questions as you watch the video, and/or answer the questions after watching the video.
aerobic exercise: Activity that increases muscular endurance and cardiovascular health.
alveoli: Tiny sacs in the lungs where gas exchange takes place.
anaerobic exercise: Activity that increases muscle strength.
artery: Blood vessel that carries blood away from the heart toward the lungs or body.
capillary: Smallest type of blood vessel that connects very small arteries and veins.
cardiovascular system: Organs involved in circulating blood and lymph through the body, including the heart, blood vessels, and the blood.
lactic acid: A waste product of lactic acid fermentation (anaerobic respiration).
muscular endurance: Ability of a muscle to do continuous work over a long period of time.
muscular strength: Amount of force that your muscles can exert against resistance.
platelet: Cell fragment in blood that helps blood clot.
pulmonary circulation: Part of the circulatory system that carries blood between the heart and lungs.
red blood cell: Type of cell in blood that carries oxygen.
systemic circulation: Part of the circulatory system that carries blood between the heart and body.
white blood cell: Type of cell in blood that defends the body against infection.
vein: Blood vessel that carries blood toward the heart from the lungs or body.
Summary
Physical activity is important for maintaining a healthy lifestyle.
Aerobic activity strengthens the cardiovascular system.
Anaerobic activity strengthens the muscular system, which benefits the overall homeostasis of the body.
The cardiovascular system delivers oxygenated blood throughout the body.
Oxygen is transferred into the blood in the lungs. Carbon dioxide is also removed from the blood in the lungs.
Review
Why is physical activity important for a healthy lifestyle?
What is the minimum amount of exercise that is recommended to stay healthy?
What is the role of the cardiovascular system?
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Description
Healthy Literacy for Teens is a middle school resource developed by Stanford University and donated to CK-12 Foundation. This FlexBook is intended to teach teenagers about their bodies and ways to maintain a healthy lifestyle. It complements and supplements CK-12's Life Science Concepts and has been aligned with CK-12 Life Science and Biology Concepts. Check out CK-12 concepts for additional information on these important topics.
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