§1.3/1.4 The Respiratory system

• Biologie
• Middelbare school
• vwo
• Leerjaar 3

1.3 The respiratory system

The photosynthesis reaction is:

... + 'energy' --> Glucose + O2

1. CO2 & H2O
2. CO2
3. H2O
4. Sunlight

Animals get their energy from glucose

1. True
2. False

This lesson

- Parts of the respiratory system

Glucose + Oxygen --> Water + CO2 + 'energy'

Gases enter and leave our body through the respiratory system

A process called respiration

Nasal and oral cavity

Nasal and oral cavity

Pharynx

Swallowing

Choking

Trachea (windpipe)

Alveoli

Homework

Make assignment 1-4, 6-9

The vocal cords can be found in the ...

1. Pharynx
2. Oesophagus
3. Epiglottis
4. Larynx

Which part separates the nasal cavity from the oral cavity?

The branches of the windpipe are called ...

1. Bronchi
2. Bronchioles
3. Alveoli
4. Oesophagus

How does the body keep dust particles and bacteria from entering your respiratory system?

Exhaled air has a higher concentration CO2 than inhaled air

True

False

No change

§1.4 Breathing

- What is gas exchange and how does it work?

- How does breathing work?

Respiration in cells

Glucose + Oxygen --> Water + CO2 + 'energy'

Oxygen enters the cells

CO2 leaves cells

Blood vessels transport these substances to and from the lungs

Alveolus/Alveoli

Alveoli

Very thin cell layers (± 1 cell thick)

Gases can flow freely from blood to alveoli and back

Breathing in

Breathing out

Mechanical breathing

Two types:

- Chest breathing

- Abdominal breathing

Chest breathing

Abdominal breathing

 §1.4

Make exercise 1-3, 5-9