Respiratory System Flashcards
Respiratory system function
How we breath, diffusion of air moves from high pressure to low pressure
move fresh air into your body while removing waste gases.
Larynx
voice box
nasal cavity
The primary entrance for air to enter the respiratory system. The air is filtered and warmed in this area
trachea
The passageway that allows air to move from your nasal cavity to your bronchi
Alveoli
Grape-like cluster where gas transfer occurs. The oxygen breathed in goes to the lungs and the carbon dioxide is breathed out
Bronchus
Conduct air through the lungs
epiglottis
The flap at the back of the throat. Usually upright to ensure air gets to your trachea.
Bronchioles
The smaller passageways that form when the bronchi further divide
Hemoglobin
protein inside red blood cells that carries oxygen. Red blood cells also remove carbon dioxide from your body, transporting it to the lungs for you to exhale. Red blood cells are made inside your bones, in the bone marrow.
Gas exchange in alveoli
capillaries in lung wrap around alveoli, carbon dioxide from blood diffuses into alveoli and oxygen from alveoli diffuses into blod stream.
Exhalation: volume decreases
- Ribs move in and down
- Volume decreases
- Pressure increases
- Air moves out
Inhalation: volume increases
- Ribs move up and out
- Volume increases
- Pressure in lungs decreases
- Air enters lung to equalize pressure
goblet cells in resp
Secrete mucus, forms a protective blanket over the top of the ciliated cells. Coordinated beating of the cilia sweeps mucus up and out of airways, carrying debris that is stuck to it.
Epithelial cells that line the trachea and bronchi produce mucus and they have cilia. Cilia move mucus and filter out any foreign material.
diaphragm
Muscle that contracts and relaxes to control lung volume
Large sheet of muscle underneath the lungs. For breathing, the diaphragm and muscles between ribs increase or decrease the volume of the lungs.
