Respiration

Lung Capacity

• Tidal Volume: amount of air breathed in and out during resting
• Vital Capacity: the max amount of air that can be breathed in and out

Bronchiole

• a very short tube
• at the ends have alveolus- moist lining and thin walls full of capillaries
• this is the surface where gas is exchanged

Gas exchange

• oxygen from inhaled air is dissolved and goes to the alveoli
• oxygen diffuses into red blood cells- haemoglobin
• CO2 is dissolved in plasma-- goes to lungs and moves into alveoli

Efficiency

• Blood moves fast- more gas exchange
• Many alveoli (300 mill)- more surface area

Respiration

• Happens in every cell all the time
• it takes oxygen from air and releases CO2

Aerobic Respiration

• energy is released when sugar molecules react with oxygen
• glucose + oxygen => carbon dioxide and water

Anaerobic Respiration

• Not enough oxygen for aerobic respiration to happen
• Ex. Sprinting- not enough O2 taken in- need to produce lactic acid- then take in needed O2 later

Debate

• Breathing is important to live
• What happens when people do actions to hurt themselves? Is it wrong?

Should smoking be illegal?

Debate

• You must find 4 strong arguments to support the side that you are on
• One paragraph as support for each argument is to be brought to the debate on Friday
• Graded on Communication and Research