Biology AS Unit 9 Gas Exchange

any part of an organism that allows the movement of gases between the surroundings and the body (lungs of mammals and gills of fish)

• lungs

• cartilage

• gas exchange surface

• goblet cells

pair of spongy, air-filled organs located on either side of the chest (thorax)

• lungs

• cartilage

• bronchi

• goblet cells

a tube like structure that extends form the larynx to the bronchi, allows movement of air into and out of the lungs

• trachea

• cartilage

• bronchi

• goblet cells

a type of skeletal tissue that is strong and flexible and supports the larynx, trachea and bronchi in the gas exchange system

• trachea

• cartilage

• bronchi

• goblet cells

a major branch of the trachea that extends into the lungs

• trachea

• bronchioles

• bronchi

• goblet cells

a microscopic branch of a bronchus that leads to the alveoli

• alveoli

• bronchioles

• elastic fibres

• goblet cells

a small air sac in the lungs composed of a single layer of squamous epithelium and some elastic fibres, each is surrounded by capillaries that transports blood from the pulmonary artery to the pulmonary vein

• alveoli

• bronchioles

• elastic fibres

• goblet cells

bundles of the fibrous protein elastin which can stretch and recoil like elastic bands, stretch up to twice their length before breaking

• alveoli

• bronchioles

• elastic fibres

• goblet cells

a cell shaped like a drinking goblet that secretes mucus, found in epithelia lining parts of the gas exchange system and other organ systems

• alveoli

• bronchioles

• elastic fibres

• goblet cells

any glycoprotein that forms part of the mucus secreted by goblet cells and mucous cells

• mucin

• ciliated epithelium

• macrophage

• goblet cells