Ch. 5 Lesson 2What are the respiratory &

circulatory systems?

Pathway of Respiration

1.Mouth/nose

Pathway of Respiration

2. Pharynx (throat)

Pathway of Respiration

3. Trachea

Pathway of Respiration

4. Bronchi

Pathway of Respiration

5. Lungs

Pathway of Respiration

6. Air sacs (alveoli)

Pathway of Respiration1. Mouth/nose 2. Pharynx (throat) 3. Trachea 4. Bronchi 5. Lungs

6. Air sacs (alveoli)

Pathway of Respiration1. Mouth/nose 2. Pharynx (throat) 3. Trachea 4. Bronchi 5. Lungs

6. Air sacs (alveoli)

Lungs

trachea (windpipe)• air tube that connects

throat to lungs

• made of cartilage = (stiff, connective tissue)

bronchial tubes (bronchi)• branch from trachea• each tube branches into smaller tubes• each twig ends in tiny air sac (alveoli)

thin walled chambers

thru which oxygen

moves blood

Trachea

Bronchial tubes

diaphragm• dome shaped muscle that moves to help

you breathe- found just below lungs

• inhale (breathe in)- moves

• exhale (breathe out)- moves

The diaphragm is a muscle in your chest.

Parts and Functions of the Respiratory System video clip

When you inhale, does your chest expand or

contract? Which direction does your diaphragm move?

When you inhale, your chest expands. The

diaphragm pulls downward.

nose

mouth

pharynx

trachea

lungs

bronchi

bronchioles

alveoli (air sacs)diaphragm

nose

mouth

pharynx

trachea

lungs

bronchi

bronchioles

alveoli (air sacs)

diaphragm

Activity-Lung Power

• Prediction: I predict that the small balloon inside the bottle will_________________

when I pull down on the large balloon.

I predict that the small balloon inside the bottle will _________________ when I push up on the large balloon.

• Result: __________________________

Lung Capacity activity

YouTube video-Bill Nye Lungs song

How long does it take blood to

circulate throughout your body?

It takes blood about one minute to

circulate throughout your body.

Circulatory SystemCirculatory System

• moves blood thru body

• works w/ resp. system

circulatory system

heart bloodblood

vessels

Respiratory & circulatory Respiratory & circulatory systems work together to systems work together to

bring oxygen to the cells of bring oxygen to the cells of the body.the body.

+

1.1.Oxygen passes from air Oxygen passes from air sacs (alveoli) sacs (alveoli) blood blood

2.2. Blood vessels carry Blood vessels carry oxygen oxygen heart heart

3.3.Heart Heart pumps pumps blood blood with with oxygenoxygen bodybody

Introduction to the Circulatory System video clip

Did you know that your heart beats over 100,000times a day?

heartheart

Right atrium

Left atrium

Right ventricle

left ventricle

The Heart

Right

atrium

Left

atriumRight

ventricle

Left

ventricle

From body in a vein

To lungs in an artery

From lungs

In a vein

To body in an artery

Pathway of Circulation

How blood moves through the bodyBlood

moves from the left

atrium to the right atrium Oxygen rich

blood from the lungs enters

the heart through the left atrium

Blood moves from

the right ventricle to the lungs to get oxygen

Bobby Cindy Greg