Biology Organ Systems Flashcards
Respiratory system function
To breathe via gas exchange.
To take in oxygen and exhale carbon dioxide
Delivers oxygen to your body’s cells
Nasal and oral cavity function
Filters and cleans air to prevent harmful substances entering system
Humidifies air so it can be used comfortably in your system
Passageway for air to be inhaled
SInus function
Drains mucus
How is mucus removed from the system
Digested in your stomach or excreted through the oral or nasal cavities.
Pharynx
Allows air to be passed from the cavities to through to the trachea
Trachea
Passage connecting Pharynx and lungs
Carries air through
Lined with mucus secreting cells
Inhaled to exhaled oxygen ratio
Oxygen: 21 - 17
Carbon Dioxide: 0.04 - 4
What parts are lined with cells that secrete mucus
Nasal Cavity and Pharynx
Mucus function
Moistens the air we breathe in
Traps Particles to prevent them from entering lungs
Most air comes from which entryway
Nasal Cavity
Cilia Function
Protects respiratory system through filtering
Moves back and forth to push particles back up to throat to be swallowed
Larynx Function
Contains Vocal Chords, contains epiglottis
Epiglottis function
Flap of cartilage that moves over trachea so that food only goes down oesophagus and not lungs
Brocnhi (Bronchus)
Connects Trachea To Lungs
Two of them
Each enters a lung
Bronchioles
Split off from primary bronchus
Delivers Air from bronchus to alveoli
Alveoli
Gas exchange happens here
Oxygen is diffused into the alveoli
Carbon Dioxide is diffused into the Capillaries
Capillaries
Beings carbon dioxide rich blood into alveoli, takes out oxygen rich blood into the rest of the system via the heart
Respiration formula
oxygen + glucose - Carbion Dioxide + Water
Why are alveoli moist?
So gas exchange can comfortably occur
Rib Cage Function
Physically protects ribs because of the hard bone structure
Flexible to limit chance of them breaking
What systems does breathing rely on
Skeleteal, muscular, and nervous
Diaphragm
Inhale - Contracts to make space for lungs which expand and air is pulled in
Exhale - Relaxes (expands) and pushes air out, lungs contract.
Air moves from
High to low pressure
When you breathe in and out the pressure will?
Decrease when breathe in, because more space is made, and pressure is lessened, air rushes in
Increase when breathe out because there is less space, and pressure is higher than outside, air rushes out
