Respiration

Gasses move from an area of high concentration to low. DIFFUSION

Inpiration (breath in) expiration (breathing out)

Exchange of O2 with CO2 in the lungs alveoli between the air and the blood

Exhnage of oxegen and carbon dioxide between the bodys tissue cells and blood.

Series of energy realising chemicals reactions that take place inside of cells. FINAL STAGE tat provides ATP for a cellular activites.

• Air passes through the nasal cavity (ciliated hair cells) that warm, clean and moistens air with secreted mucous.
• Air passes through the upper respiratory tract (pharanx, larynx and epiglottis) Eppigolits is open at rest to the larynx (voice box made up of elastic ligaments.
• Then travels into the trachea made up of semicircular bands of cartilage. (mucous and cilia also present to moisten/clean air also to trap debris)
• (Lower respiratory tract) Air travels into the lungs through the bronchi, as the lungs inflate they expand and the pleural membrane helps reduce friction from rubbing.
• As air enters the lungs through the bronchi, it gets dispersed into smaller sections known as bronchioles. Both are lined with mucous and cillia.
• Air then enters alveoli at the ends of the bronchi where gas exhnage occur (external respiration)

• Ventilate air through negative pressure breathing. (vacuum/inhale) Diaphragm contracts downward
• diaphragm goes at rest when exhaling.