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human breathing

QuestionAnswer
what is the throat and voice box called throat=pharynx voice box=larynx
what is each lung enclosed by a pair of pleural membranes. the outer pleura lines the chest wall and the diaphragm. the inner pleura lines the lungs.
what is the function of the alveoli gas exchange by diffusion
why do alveoli have this function large surface area. thin walls. moist surfaces. enclosed in a large network of capillaries.
homeostasis keeping a constant internal environment in the body
importance of homeostasis to allow cells to carry out normal metabolic activities
major organs of homeostasis kidneys, lungs, liver, skin
name a breathing disorder and its symptoms, cause and treatment Asthma. shortness of breath, noisy wheezing breathing, coughing. allergens such as pollen, feathers, dust, moulds. inhaling drugs to dilate the bronchioles.
control of rate of breathing level of CO2 in blood
control centre of breathing medulla oblongata in the brain
inhalation is.... the active phase because it involves muscle contraction.
describe the mechanism of inhalation 1. the intercostal muscles contract and move the ribcage up and out. 2. the diaphragm contracts and flattens. 3. the volume of the thorax increases. 4. the lung air pressure decreases below that of outside air. 5. air flows into the lungs.
exhalation is..... the passive phase
describe the mechanism of exhalation 1. intercostal muscles relax and the ribcage goes down and in. 2. the diaphragm relaxes and becomes dome-shaped. 3. the volume of the thorax decreases. 4. the lung air pressure increases above that of outside air. 5. air is forced out of the lungs.
Created by: caoimhefraher
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