respiratory system bio lesson

Function of the respiratory system

To bring oxygen into your body and to rid the
body of carbon dioxide

Multiple Choice

A. Why is oxygen important

B. How do we get it?

• A. to make energy

  B. from food

• A. to make glucose

  B. From the air

• A. For cellular respiration

  B. From breathing air

• A. To help digest food

  B. From breathing

Open Ended

What do you think we need oxygen for?

O₂ + Glucose --> ATP + CO2 + H₂0

​

​

​

​

​

​

​

​Some text here about the topic of discussion.

Cellular Respiration

​

​Cellular respiration occurs in mitochondria of cells, the

powerhouse. This is where glucose is converted into ATP energy.

Components of the Upper Respiratory Tract

Figure 10.2

1.

Air enters mouth
and nose. The nose
(nasal cavity warms
the air)

2.

air moves through
the pharynx
(pathway for food
and air)

3.

air moves into the
larynx (voice box) .

Pathway of air: nose or nostrils, nasal cavity, mouth, pharynx, larynx.

Draw

Your nose has olfactory senses ( sense of smell)

Draw something fragrant just for fun. Use different colors.

Draw

Draw an arrow showing air moving through mouth and nose, to pharynx, larynx to trachea.

Components of the Lower Respiratory Tract

Figure 10.3

Pathway: trachea (windpipe), bronchi, bronchioles, lungs with alveoli . The trachea is lined with cilia to help filter the air before it reaches the lungs.

Flow of Air

-Air enters the body through the mouth and nose.
-It moves through the pharynx. Both food and air go through
here.
-It passes through the larynx (voice box) to the trachea
(windpipe)
-The trachea is lined with cilia that sweep out foreign particles
like dust.
-The trachea branches into 2 bronchi. These then branch into
smaller tubes called bronchioles
-At the ends of the bronchioles are air sacs called alveoli
where gas exchange takes place.

​Little hairs called cilia line the trachea to sweep out unwated dirt and dust.

Draw

Draw tiny lines to show where cilia would be found in the respiratory system

Multiple Choice

Which is NOT a function of the respiratory system?

• to get rid of oxygen

• to get rid of carbon dioxide

• to take in oxygen

• to warm and filter the air you breath

Gas Exchange Between the Blood

and Alveoli

Figure 10.8A

oxygen
leaves the alveoli and
goes into the blood by
diffusion.

The blood travels to
the body cells and
drops off oxygen and
picks up carbon
dioxide.

Carbon dioxide leaves
the blood and goes into
the alveoli by diffusion.
It is the exhaled out

Multiple Choice

How does oxygen and carbon dioxide move between the alveoli and the blood?

• active transport

• diffusion

• osmosis

• absorption

Multiple Choice

Oxygen moves from

• the alveoli into the blood then to body cells

• the body cells to the blood the the alveoli

• the alveoli directly to the body cells

Draw

Using a red pen, draw the pathway air moves from the mouth to the alveoli.

Respiratory Cycle

Figure 10.9

Draw

Draw a respiratory system. Include trachea, bronchi, lungs, diaphragm. Use a red arrow to show the direction the diaphragm moves when inhaling. Use a blue arrow to show the direction the diaphragm moves when exhaling.

Regulation of Breathing

Figure 10.13

■ Reduced air flow:

■ asthma,

■ emphysema,

■ Infections: pneumonia, tuberculosis,

bronchitis

■ Lung cancer

■ Cystic fibrosis (genetic)

Disorders of Respiratory System

Open Ended

Choose a respiratory disorder. Research and write about it. Include: cause, symptoms, treatment, prevention