8th grade ch 4 sec 1 respiratory system

Ch. 4Sec. 1 Respiratory

System

Discover activity- How big can you blow up a balloon?

Attempt Circumference

1.

2.

3.

Average of 3 attempts

respiration (cellular respiration)

•process where glucose & oxygen undergo complex series of chemical reactions in cells

respirationrespiration

Systems Systems working working togethertogether

path path of airof air

Path of airPath of air1. NOSE • lined w/cilia &

mucus- cleans, warms & moistens air

2. PHARYNX (throat)

3. TRACHEA (windpipe)•made of cartilage•lined w/cilia & mucus•epiglottis prevents choking

4. BRONCHI (bronchus)•direct air lungs

5. LUNGS•main organs of resp. system•bronchi divide into smaller branches (bronchioles)

6. ALVEOLI (alveolus)•ends of bronchioles•hollow air sacs surrounded by capillaries•large surface area•gas exchange-oxygen & CO2

(& water)

Respiratory System activities

The Respiratory System [05:11]

breathing

•movement of air in & out lungs

How you breathe•diaphragm=

–large, dome-shaped muscle that plays important role in breathing

•inhale- diaphragm moves–rib muscles contract

•exhale- diaphragm moves –rib muscles relax

Animation of lungs breathing

How you speak

•larynx (voice box)– @ top of trachea

vocal cords

• stretch across opening of larynx

• air passes over vocal cords

•vibration creates sound

Time to test your knowledg

e

respiration•process where glucose & oxygen

undergo complex series of chemical reactions in cells

breathing•movement of air in & out lungs

Which do you inhale when you breathe:

oxygen or carbon dioxide?

When you inhale you breathe in

oxygen. When you breathe out

you exhale carbon dioxide.

When you inhale, does your chest expand or

contract?

When you inhale, your chest expands. The

diaphragm pulls downward.

Are vocal cords located inside your larynx,

trachea, or esophagus?

The vocal cords are located inside your larynx.

Hi! I’m Hi! I’m Larry!Larry!

What substances are exchanged in the alveoli?

1. oxygen2. carbon dioxide3. water

Make a diagram of the respiratory system. pg. 115Make a diagram of the respiratory system. pg. 115

Label nose, pharynx, larynx, trachea, bronchus, bronchioles, alveoli, Label nose, pharynx, larynx, trachea, bronchus, bronchioles, alveoli, lungs & diaphragm.lungs & diaphragm.