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ETM Respiratory Sys

Respiration System for exercise to music qualification

QuestionAnswer
What is respiration? Respiration is the process of 'breathing', and at it's most basic, the movement of air in and out of the lungs.
Why do our cells need oxygen? Our cells need oxygen to be able to produce ATP (for energy) and eliminate carbon dioxide, which is its waste product.
What is the pathway by which air travels to the lungs? Nose/Mouth- Pharynx (throat)- Larynx (voice box) - Trachea (windpipe)- Bronchus- Bronchioles- Alveoli (air sacs)
What is each alveolus surrounded by? A network of pulmonary capillaries, surrounds each alveolus. The exchange of oxygen and CO2 takes place through the single cell walls.
How does oxygenated blood from the lungs return to the heart? Pulmonary veins
What are the main respiratory muscles? Diaphragm and intercostal muscles
Describe what happens when we inhale/inspire? The diaphragm contracts (flattens) and expands the chest cavity. The external intercostal muscles contract pulling the ribs up and out. The alveoli expand and air is taken into the lungs.
When the diaphragm and external intercostal muscles relax, what happens? We expire/exhale. The chest becomes smaller, the lungs are compressed, their elastic connective tissue recoils compressing the alveoli... air is forced out.
How is our respiration rate controlled? The respiratory centre of the brain responds very quickly to slight changes in the blood concentration of carbon dioxide.
Created by: 508872840
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