Gas Exchange 7A/B

Answer the question:

Why can't fish use their bodies as an exchange surface?

Name and describe three adaptations of a leaf that allow efficient gas exchange.

What part of the gas excgange is it?

Name the red pigment inside red blood cells that helps to carry oxygen

Name the organ

Describe the structure of the trachea and its function in the mammalian gaseous exchange system.

• Wide tube supported by C-shaped cartilage to keep the air passage open during pressure changes.

• Do not need to be kept open by cartilage, therefore mostly have only muscle and elastic fibres so that they can contract and relax easily during ventilation.

• Mini air sacs, lined with epithelium cells, site of gas exchange.

• External intercostal muscles relax (while internal contract), bringing the ribs down and in.

The number of breaths we take per minute is called the exhale rate

• TRUE

• FALSE

what are some risk factors for lung disease?

The number of breaths we take per minute is called:

• breathing ratio

• tidal volume

• breathing rate

• ventilation rate

Point the ARTERIES