A&P study notes

Organs include

Nose- nasal

Pharynx - throat

Larynx- voice box

Trachea- windpipe

Bronchi- air passage

Lungs - alveoli

Where does gas exchange occur between blood & external environment?

Only in the ALVEOLI OF lungs

Upper respiratory tract

Passageway from nose to larynx

Lower respiratory tract

Passageway from trachea to alveoli

What does passageway to lungs do?

Purify, humidify, and warm the incoming air

What is the ONLY external part of respiratory system

NOSE

The nose

Where air enters

Nasal cavity is the interior of the nose olfactory epithelium - detects odour

Nasal septum: divides the nasal cavity

What is respiratory passages line with?

Mucous membrane (mucosa) which is wet or moist membrane

What is respiratory system?

Provides oxygen to body, gets rid of carbon dioxide, helps regulate blood pH

What happens to cells without oxygen?

Death. Too much carbon dioxide in blood pH will become acidic which will interfere with cellular function

Where does gas exchange occur??

Air sac of lungs - alveoli, at the capillary beds around body.