Lesson 2.13: Respiratory System

A) Respiratory System Structure & Function Made of nose, mouth, trachea, bronchi and lungs Allows ____________ to enter and ____________ ____________ to leave

B) Path of Air mouth/nose —> ____________ (throat) —> ____________ (voice box) —> ____________ (windpipe) —> ____________ (singular bronchus) —> ____________________ —> ____________ (air sacs)

Trachea is supported by rings of ____________ Keep the trachea ____________, allows air to flow freely

The bronchioles and alveoli are in the ____________ C) Epiglottis

Tissue flap, covers ____________ opening keeps food & liquid from going to lungs

D) Epithelial Cells Line ____________ and ____________ Produce ____________ which catches ____________ Have ____________ (hairlike projections)

Cilia moves mucus up into the ____________ Mucus is ____________ out or ________________

E) Gas Exchange Occurs at ____________

densely covered in ____________ • Oxygen is in the alveolus • That oxygen diffuses into the ____________ • The blood with oxygen goes to the _________________,

where it is pumped to the rest of the body • ____________ ________________ is in the blood • The capillary with the blood is touching the alveolus • The carbon dioxide diffuses from the ________________

into the ________________ • From the alveolus, the carbon dioxide moves up the lung

and is released to the __________________ through the mouth

1) _____________________ 2) _____________________ 3) _____________________ 4) _____________________ 5) _____________________ 6) _____________________ 7) _____________________ 8) _____________________ 9) _____________________

F) Breathing (How to get air into our out of the lungs) Breathing is ________________, and is under the control of:

1) ___________________ : Muscles between ribs, expand and contract chest cavity 2) __________________: Sheet of muscle under ribs

Controlled by part of brain monitoring _______________ ________________ in blood More carbon dioxide sends signals to the diaphragm, intercostals & heart Breathing and heart rate ___________________ The opposite happens if a lot of oxygen is in the blood

G) Respiratory System in Fish fish have gills instead of lungs gills are exposed directly to ____________ gills have many _________________ oxygen ____________ from water into blood carbon dioxide diffuses from blood to water

H) Tuberculosis (TB) • ___________________ disease - easily passed from person to person • caused by ____________________ that grow in your lungs • is fatal if left untreated • looks like ___________________ on an x-ray, so diagnosis depends on analyzing lung

or stomach ______________________ • can be _____________________ for a long

time

Inhalation ExhalationRib cage

Diaphragm

Chest cavity size

Chest cavity pressure

movement of air !!