Gas Exchange (ks3)

Keywords that are used during gaseous exchange. (

nasal cavity & oral cavity

where the air is moistened and filtered to go into the lungs.

cilia & mucus

to remove dust/bacteria/contaminates from the air

Pharynx

carries air, food and fluid down from the nose and mouth

Larynx

the voice box/also controls when food goes down the esophagus and air going down the trachea

Epiglottis

prevents substances from going down the wrong pipe

trachea

A long, cylindrical tube with rings of cartilage around it to keep the trachea open an allow it to contract when food goes down the esophagus

Primary/Bronchi

the 2 pipes that lead into each lung

Secondary/tertiary bronchi

smaller tubes after the primary bronchi leading to the smaller bronchioles. The Alveolar ducts are at the end of the small bronchioles.

alveolar sacs (Alveoli)

the air sacs at the end of the bronchioles. Look like a bunch of grapes

Blood capillaries

delicate blood vessels that carry blood around and are also wrapped around the Alveoli

diffusion

atoms/cells move to a place of less concentration.

Carbon dioxide

A waste gas.