RESPIRATORY SYSTEMChapter 11.1

What are its functions?

IT MOVES OXYGEN FROM THE OUTSIDE ENVIRONMENT

INTO THE BODY.

ALSO REMOVES CARBON DIOXIDE FROM THE BODY.

Respiration: process in which oxygen and glucose undergo a complex series of chemical reactions; AKA cellular respiration

Where does the air travel?

1- Nose2- Pharynx3- Trachea4- Bronchi

Gases are exchanged in the alveoli

Cilia: tiny hair-like extensions that move together in a sweeping motion

Pharynx: the throat, part of both the respiratory and digestive system

Trachea: windpipe; a passage through which air moves in the respiratory system

Bronchi- passages that direct air into the lungs

Lung- organ found in air-breathing vertebrates that exchanges oxygen and carbon dioxide with the blood

Alveoli- tiny sacs of lung tissue specialized for the movement of gases between air and blood

How is gas exchanged in the Alveoli?

1-air enters alveoli2-oxygen passes through the wall of the

alveolus3-then it passes through the capillary wall4-Oxygen enters blood5- Carbon Dioxide & water pass from blood

into alveoli& TA-DAA ---Gas Exchange!

Do you need muscles to breathe?

Diaphragm- a large muscle located at the bottom of a mammal’s rib cage that functions in breathing

When breathing, the actions of your rib muscles and diaphragm expand or contract your chest…air flows in or out.

YES!!

Speaking

Larynx- voice box, located in the top part of the trachea, underneath the epiglottis

Vocal Cords- folds of connective tissue that stretch across the opening of the larynx and produce a person’s voice