Respiratory System

Video

•Respiration System

• You will the outline notes to record information from the power point notes.

Functions of the Respiratory System

• Supplies oxygen to the blood

• Removes carbon dioxide from the blood

Functions of the Respiratory System

• Breathing – the physical process of moving air

into and out of the lungs

• Exchange of gases, specifically oxygen (in)and

carbon dioxide (out)

What happens when you breathe?

• When you inhale, air is drawn into the lungs. This oxygen then moves into the blood from the lungs.

• The oxygen rich blood travels throughout the body.

• Oxygen leaves the capillaries and enters each cell.

What happens when you breathe?

• When you exhale, carbon dioxide is released. CO2 is a waste product of cellular respiration and the body needs to get rid of it.

• CO2 moves from cells in the body to capillaries where it is carried in the blood all the way to the lungs. Then it is exhaled through the lungs.

What is respiration then?

• Respiration – chemical process of

releasing energy from glucose in the cells.

• There are 2 types:

• Aerobic – needs oxygen and releases

energy

• Anaerobic – does NOT need oxygen, and

releases far less energy

Aerobic vs. Anaerobic

• Make this chart in your notes:

Aerobic Respiration Anaerobic Respiration

1 Uses oxygen 1 Doesn’t use oxygen

2 Involves the exchange of gases between organism and its environment

2 Doesn’t involve gas exchange

3 Make a LOT of energy (in the form of ATP)

3 Makes less energy

FIND THIS PAGE:

• FILL IT OUT, BOTH

THE DIAGRAM

LABELS AND THE

CHART WITH

STRUCTURE NAME

AND FUNCTION – AS

WE GO THROUGH

THE NOTES

Structures (Organs) of the

Respiratory System

• Nose - Nasal

cavity (1) = air is

cleaned, warmed,

and moistened

• Mouth (2) -

air enters through the

mouth, as well as the

nostrils

Structures/organs of the

Respiratory System

•Throat

• Pharynx (3) =

passageway for both

food and air

Structures/organs of the

Respiratory System

• Throat -• Epiglottis (4) = flap that

closes over the larynx. The epiglottis is a flap of tissue. Its main function is to close over the windpipe (trachea) while you're eating to prevent food from entering your airways.

• larynx (5) - is the top part of the trachea

Structures/organs of the

Respiratory System

• Throat

• Larynx = air only;

vocal chords are

attached here. Purpose is to make sound, your voice!

Vocal chord video:

How the larynx works

Structures/organs of the

Respiratory System

•Trachea – (6)• Trachea (windpipe)

c-shaped rings of

cartilage keep it

open all the time

Function - connects the larynx to the bronchi and allows air to pass through the neck and into the thorax.

Structures/organs of the Respiratory

System

Lungs (7)

In the lungs, the oxygen is moved into the bloodstream and carried through the body.

Structures/Organs of the

Respiratory System

In the lungs:

• (8) Bronchi = 2 small

branches at end of

trachea

Their function is to carry air

into lungs

Structures/Organs of the

Respiratory System

Lungs

• (9) Bronchioles =

smaller branches

off of bronchi

Function - Bronchioles are tiny airways that carry oxygen to alveoli, or air sacs, in the lungs

Organs of the Respiratory

System

Lungs - (10)Alveoli

• Alveoli = tiny, grape-

like sacs at the end

of bronchioles;

surrounded by

capillaries

Their function is to allow oxygen and carbon dioxide to move between the lungs and bloodstream

Organs of the Respiratory

System

Diaphragm (11)

(muscle below the

lungs that helps

air move in and out of the body)

When you breathe in, the diaphragm contracts downward, creating a

vacuum that causes a rush of fresh air into the lungs.

The opposite occurs with exhalation, where the diaphragm relaxes

upwards, pushing on the lungs, allowing them to deflate.

Capillaries (not on your page, write the next few

slides on that first note page in your journal)

• Capillaries are the smallest of the body's blood vessels.

• They are only one cell thick, and they transfer oxygen and other nutrients from the bloodstream to other tissues in the body; they also collect carbon dioxide waste materials and fluids for return to the veins.

Gas Exchange in the Lungs

• Takes place between alveoli and capillaries

INHALE

oxygen enters body

into alveoli

into capillaries

into blood

to body cells

Gas Exchange in the Lungs

• Takes place between alveoli and capillaries

EXHALE

leaves body

into alveoli

into capillaries

into blood

CO2 from body cells

Quick

check!

What is the function of the

respiratory system?1. To provide oxygen & carbon dioxide to the body cells.

2. To provide carbon dioxide to body cells & remove oxygen.

3. To provide oxygen to body cells & remove carbon dioxide.

4. To remove oxygen & carbon dioxide from the body cells.

Where does the exchange of

oxygen and carbon dioxide occur?

1. The heart

2. The alveoli

3. The pharynx

4. The body cells

What carries the blood back to the

heart after it picks up oxygen from

the alveoli?1. Lungs

2. Aorta

3. Pulmonary

artery

4. Pulmonary vein

What is this structure?

1. Diagram

2. Diagonal

3. Diaphoresis

4. Diaphragm

What causes you to exhale?

1. Your lungs contract to squeeze the air out.

2. Your diaphragm moves up, pushing air out of the lungs.

3. Your ribs squeeze the air out of your lungs.

4. Your diaphragm moves down, letting air escape from your lungs.

Notes

• Your notes should be complete

• Glue them in to your journal now

• Then make sure you have a computer and the HW assignment, “Body Smart Scavenger Hunt” – we can start on it now.

• How breathing works: http://ed.ted.com/lessons/how-breathing-works-nirvair-kaur

• Crash Course Videos:

• Respiratory System 1 (9 min)

• Respiratory System 2 (10 min)