Bio 2 Exam Respiratory System
Last Modified: 2011-07-16
Related Textbooks:Biology: Life on Earth with Physiology (9th Edition)
Starts as trachea (trunk)
Splits into primary, then secondary, then tertiary Bronchi
Then splits into bronchioles
bronchioles split into terminal bronchioles
split into alveoli
300 million in lungs.
Capillaries cover alveoli to allow exchange of gases
Surrounded by surfactant to reduce surface tension and make breathing easier
this causes air to rush in
this pushes air out until pressure is equal inside and outside of lungs
Breathing that we can control
- sensors in heart sense CO2 and O2 levles in blood to adjust breathing
passage of air to bronchi
lined with cilia and mucus to help keep lungs clean
respiratory control center in the brain
sends out nerve impulses to contract muscles for inspiration
Sinusitis -- blockage of sinuses
Otitis Media- - infection of the middle ear
Tonsillitis -- inflamation of the tonsils
Laryngitis -- infection of the larynx that leads to the loss of voice
Pneumonia -- infection of the lungs
Tuberculosis -- Bacterial infection
Pulmonary fibrosis -- lungs lose elasticity
Emphysema -- alveoli are damaged -- surface area for gas exchange is reduced
Asthma -- Bronchial tree becomes irritated
Lung Cancer -- uncontrolled cell division in the lungs
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