Respiratory system

Respiratory System

Structure and Function

What body systems are involved in
taking oxygen into the body and
delivering that oxygen to cells?

What wastes are produces by
respiration?

Accessing Prior Knowledge

During respiration …

◼ Glucose molecules are broken

down to release ATP energy

◼ Site- mitochondria

Cellular Respiration

◼
Glucose + oxygen -------> carbon dioxide + water + ATP energy

reactants Products

CO2 builds up In the cell. How does this cell get rid of this wastes?

Multiple Choice

The main source of energy for all life comes from ____.

• the Earth

• the moon

• the sun

• the food we eat/make

Multiple Choice

Where does cellular respiration take place in the cell?

• Cell Membrane

• Nucleus

• Mitochondria

• Vacuole

Multiple Choice

What is the purpose of cellular respiration?

• to break down food

• to create energy in the body

• to release energy from food

• there is none; it's a waste of time

Multiple Choice

you breathe in oxygen for

• photosynthesis

• fermentation

• mitosis

• cellular respiration

Multiple Choice

The mitochondria is responsible for ...

• photosynthesis

• cellular respiration

Multiple Choice

Which of the following is produced during cellular respiration?

• Protein

• Oxygen

• Carbon dioxide

• Glucose

Today I will…

identify the structure of the respiratory
system.

describe the functions of each part of
the respiratory system.

describe how the respiratory system
works.

Function

• Allows us to breathe, known as

respiration.

• Transports oxygen (O2) from

outside the body to cells and
tissues. Transports carbon
dioxide (CO2) and waste from
cells to the environment. This
process is called gas exchange

• Protects the body against foreign

invaders.

Multiple Choice

What is the function of the respiratory system?

• Gas exchange

• protects us from from foreign invaders

• allows us to breath (respiration)

• All of these are functions of the respiratory system

Organ overview

• The respiratory system is

composed of numerous
organs used to carry air
into and out of the lungs

• These main organs include:

• Nose/Mouth
• Pharynx
• Larynx
• Trachea
• Lungs
• Bronchial tree

Respiratory System Organs

NOSE

LARYNX

LUNG(S)

PHARYNX

TRACHEA

BRONCHIAL
TREE

Nose/Mouth

• Air enters and exits.
• Hair and mucus lining

the nasal cavity warm,
moisten, and filter dust
and microorganisms

NASAL CAVITY

Pharynx

• Also known as the

throat.

• Air moves from the

nose/mouth into the
pharynx.

• Food and drink also

travel through the
pharynx.

PHARYNX

Multiple Choice

When we breathe in...................enters our lungs and passes into the blood.

• oxygen

• carbon dioxide

Larynx

• The part of the throat

that contains the vocal
cords.

• When air flows between

the vocal cords they
vibrate and make
sound.

VOCAL
CORDS

LARYNX

Trachea

• Also known as the

windpipe.

• Carries air from the larynx

to the bronchial tree.

• The tube is held open by

C-shaped cartilage rings

LUNGS

TRACHEA

CARTILAGE RINGS

Multiple Choice

The windpipe is also called

• trachea

• alveoli

Lungs

• Soft, spongy tissue;

they contain no
muscle.

• Fill up most of the

chest.

Multiple Choice

They are two sacks protected by the ribs.

• alveoli

• lungs

Bronchial Tree

Bronchi (bronchus)
• Main airway into the lungs.
• Lined with mucus cells to

capture foreign particles,
including: viruses,
bacteria, fungi, bits of dust
and debris.

BRONCHIAL TREE

BRONCHI

BRONCHIOLES

ALVEOLI

Alveoli

• microscopic air sacs at the

ends of the bronchioles.

• where the lungs and blood

capillaries exchange O2 and
CO2 during gas exchange

• gases can easily pass

through by diffusion

BRONCHI

BRONCHIOLES

ALVEOLI

CAPILLARIES

Multiple Choice

Inside the lungs there are lots of little sacks called.......

Here, oxygen passes into the blood and carbon dioxide leaves the blood.

• lungs

• alveoli

Multiple Choice

When we ................... carbon dioxide leaves our body.

• breathe in

• breathe out

Multiple Choice

What is the main function of the respiratory system?

• to provide oxygen and remove carbon dioxide from the body

• to bring oxygen to the body

• to break down food and absorb nutrients

• to remove oxygen from the body and deliver carbon dioxide

Diaphragm

• Major domelike shape

muscle of the respiratory
system

• Contraction creates a

vacuum, which pulls air into
the lungs.

BRONCHI

BRONCHIOLES

ALVEOLI

CAPILLARIES

Gas Exchange in the Alveoli

•At the alveoli, O2 in the
alveolar air sac diffuses into
the bloodstream across the
respiratory membrane

•Diffusion occurs since the
blood is low in O2 while the
alveolar sac is high in O2

•Meanwhile, CO2 in the
bloodstream diffuses into
the alveolar air sac

•Diffusion occurs since the
blood is high in CO2 while the
alveolar sac is low in CO2

O2
O2

CO2

CO2

BLOODSTREAM IN CAPILLARIES

CO2 DIFFUSES FROM BLOOD INTO AIR

O2 DIFFUSES FROM AIR INTO BLOOD

ALVEOLAR AIR SACS

Review: Organs and Functions

A

B

C

D

E

F

NOSE

LARYNX

LUNGS

PHARYNX

TRACHEA

BRONCHIAL TREE

Breathing Pathway

NOSE / MOUTH

1

1

PHARYNX

2

2

LARYNX

3

3

TRACHEA

4

4

LUNGS

5

5

BRONCHIAL TREE

6
6

ALVEOLI

7

7

Multiple Choice

Which is not a job of the respiratory system?

• takes in oxygen

• gets rid of carbon dioxide

• moistens air

• makes ATP

Multiple Choice

Which best explains the effects of exercise on the respiratory system?

• Exercise increases breathing rate which makes the lungs stronger.

• Exercise increases breathing rate which makes the bones stronger.

• Exercise decreases breathing rate which sends more oxygen to the brain.

• Exercise decreases breathing rate which produces more wastes for the kidneys to process.

Multiple Choice

Which best compares the respiratory system to the circulatory system?

• The respiratory system transports oxygen to cells, while the circulatory system provides oxygen for cells.

• The respiratory system provides oxygen for cells, while the circulatory system transports oxygen to cells.

• The respiratory system breaks down food for cell energy, while the circulatory system rids the body of waste.

• The respiratory system rids the body of waste, while the circulatory system breaks down food for cell energy.

Multiple Choice

Identify the correct organs for the Respiratory System:

• Mouth, Esophagus, Stomach, Small and Large Intestines

• Nose, Trachea, Lungs

• Heart, Veins, Arteries

Multiple Choice

Identify the correct organs for the Circulatory System:

• Mouth, Esophagus, Stomach, Small and Large Intestines

• Nose, Trachea, Lungs

• Heart, Veins, Arteries

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