Source: http://www.digitaltrends.com/cool-tech/breathing-scientists-injectable-oxygen/

Draw – Label – Annotate(Starter activity)

Previously you have learnt about the digestive system. Get ready, make sure you have access to:• (sharp) pencil• ruler• A3 paper

By Chris Paine

https://bioknowledgy.wikispaces.com/

• You are drawing, labelling and annotating the digestive system:(IG) 2.44 describe the structure of the thorax, including the ribs, intercostal muscles, diaphragm, trachea, bronchi, bronchioles, alveoli and pleural membranes(DP) 6.4.4 Draw and label a diagram of the ventilation system, including trachea, lungs, bronchi, bronchioles and alveoli. Students should draw the alveoli in an inset diagram at a higher magnification.

• The group will the highest total will receive a reward.

Draw – Label – Annotate Guidelines

Draw – Label – Annotate Guidelines1. Form groups of three students2. Everyone draws a respiratory system DO NOT Label (2 mins)3. Pass your drawing to the next person in your group4. Everyone labels the drawing they have in front of them DO

NOT Annotate and DO NOT add to the drawing (1 min)5. Pass the labelled drawing to the next person in your group

(you should be looking at a different drawing again)6. Annotate EXISTING LABELS only (3 mins)7. Now for the reflection: trade your group’s papers with a

different group (the teacher might ask you to rotate papers between groups rather than trade)

8. Mark the drawings according to the mark scheme you are shown on the next slides

Labelling (1 mark each, 9 max)

Adapted from: http://www.ib.bioninja.com.au/

n.b. although this is a good diagram it is bad practice to use arrow heads on label lines.

Pleural membrane

Annotations (1 Mark for each, 16 max)Structure Function

ribs • Collects deoxygenated blood from the body and delivers it to the heart

intercostal muscles

• External muscles contract (internal relax) to pull ribs upwards and outwards …

• … this increase the volume of the lungsdiaphragm • Contracts to flatten and move downwards …

• … this increases the volume of the lungs

trachea • Allows air to move from the lungs to the mouth and out the body• C-shaped pieces of cartilage ring the trachea to stop it collapsing

bronchi • Connects the trachea to each lung• C-shaped pieces of cartilage ring the bronchi to stop them collapsing

bronchioles • Form a branched network of air passages that deliver air to all parts of the lung

Annotations (1 Mark for each, 16 max)Structure Function

alveoli • These air-sacs are where gas exchange occur• Each lung contains millions of alveoli to give a very large surface area

for gas exchangepleural membranes

• These membranes hold the pleural fluid and separate the lungs from the ribs and rib muscles

• Lubricates and reduces the friction due to breathingLungs • Contains both a network of air passages, alveoli and blood vessels to

allow efficient gas exchange• Elastic –the lungs can be stretched to increase their volume (and

hence reduce the pressure) to allow ventilation to occur

Deductions

• -1 for for label lines not drawn with a ruler• -1 arrow heads on label lines (I know the example

diagram did have arrow heads, but this is bad practise)

• -1 for drawing <1/2 a page in size• -1 for shading• -1 for sketching rather than outlining

n.b. deductions are per drawing, not per incidence

Reflection

• Total the marks by group to see which group did best– Rewards for the best group

• In groups discuss what group you are marking did well and what they could improve on. Comments should be in terms of “next time they should …”

• As a class share your “next time” recommendations is there a lot of similar mistakes being made?

• Return drawings• Using your feedback produce an excellent example drawing

to add to your notes