Transcript THE RESPIRATORY SYSTEM

THE RESPIRATORY
SYSTEM
BillNye-Respiration YouTube
I. MAIN FUNCTION OF
RESPIRATION
* provide the body with OXYGEN it
needs to have ENERGY and to grow
* transport GASES to and from the
CIRCULATORY SYSTEM
II. RESPIRATORY STRUCTURES
 LUNGS
* sites of GAS EXCHANGE
* left (2 lobes) and right (3 lobes)
 MOUTH AND NOSE
* air FILTERS through the HAIRS
* air MOISTENED and WARMED
* lined with CILIA
 PHARYNX
* passageway for FOOD and AIR
 EPIGLOTTIS
* flap of CARTILAGE that covers
the AIR passage when food is
SWALLOWED
* OPEN when breathing
 LARYNX
* VOICE BOX
* contains VOCAL CORDS(two
ligaments)
beth's vocal cords
 TRACHEA
* WINDPIPE
* ciliated,
CARTILAGINOUS tube
 BRONCHI
* TWO tubes that lead to LUNGS
 BRONCHIOLES
* smallest of branching BRONCHI
 ALVEOLI
* clusters of tiny AIR SACS at the
ends of the BRONCHIOLES
* covered with CAPILLARIES (tiny
blood vessels)
 DIAPHRAGM
* dome-shaped SKELETAL MUSCLE
* INHALE – contracts & moves DOWN
* EXHALE – relaxes & moves UP
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