TOPIC 3 – LUNG FUNCTION

Understand that the vital part the lungs and associated process of respiration play in enabling us to stay alive and to engage in physical activity

Learning Outcomes:

A – Use independent skills to develop knowledge on the functioning of the lungs

B – Explain important keywords associated with the functioning of the lungs

C – Identify the different keywords associated with the functioning of the lungs

Do Now Task – List everything you remember from GCSE about the functioning of the lungs

BACKGROUND

To maintain life humans must supply their bodies with oxygen and remove carbon dioxide.

Why do we need oxygen in the body?

To release the energy stored in food so it can be used to supply all the cells around the body

The process of breathing, respiration and transportation of gases is done by the cardio-respiratory system.

Understand the vital part the lungs and associated process of respiration play in enabling us to stay alive and to engage in physical activity

RESPIRATION

External Respiration – The process of exchanging gases in the lungs

Internal Respiration – The process of exchanging gases between the muscle cells and the blood

Understand the vital part the lungs and associated process of respiration play in enabling us to stay alive and to engage in physical activity

ATP – chemical found in cells

Breakdown of ATP – releases energy to sustain all cells

Limited ATP means re-synthesise large

amounts

This requires energy

Breakdown food to release energy

Respiration

BACKGROUND

Efficient lungs and structures to have sufficient respiration

Sports performer use more energy than the average person

So will need an above average functioning of their systems

Training forces the body to adapt so that the body is getting its required needs

People with activity levels even below average will have lungs that may not even function for normal living activities

Understand the vital part the lungs and associated process of respiration play in enabling us to stay alive and to engage in physical activity

TASK

With your partner count how many breaths they take in a minuteWrite it on your page.

Now perform a 1 minute jog with sprints – led by teacherGet partner to re-count breaths

Understand the vital part the lungs and associated process of respiration play in enabling us to stay alive and to engage in physical activity

MECHANICS OF BREATHING

To understand breathing we need to understand the structure of the lungs and the respiratory airways – The tubes that take the air to and from the lungs

Understand the vital part the lungs and associated process of respiration play in enabling us to stay alive and to engage in physical activity

AIR

Air is a mixture of gases

Oxygen, nitrogen, carbon dioxide, inert gases and often some water vapour.

Air enters the mouth, travels through the nasal cavity, through the larynx, down the trachea, into the bronchus, then bronchioles and

finally into the alveoli or air sacs.

Understand the vital part the lungs and associated process of respiration play in enabling us to stay alive and to engage in physical activity

Task – Draw out a flow chart of this process and think of a mnemonic to help remember the process

LUNGS

Two sac-like organs, spongy in appearance and they sit in our chest or thoracic cavity.

They are surrounded by the pleural membrane. And bordered by a sheet of muscle called our diaphragm.

Air moves from areas of high to low pressure. When breathing in, our bodies lower the pressure in our lungs to

that of the outside atmosphere so that air can flow into them.

Understand the vital part the lungs and associated process of respiration play in enabling us to stay alive and to engage in physical activity

INSPIRATION (BREATHING IN)Understand the vital part the lungs and associated process of respiration play in enabling us to stay

alive and to engage in physical activity

EXPIRATION (BREATHING OUT)Understand the vital part the lungs and associated process of respiration play in enabling us to stay

alive and to engage in physical activity