2.1 Structure of the respiratory system

key structure

larynx: Contains muscle and ligaments and is our vocal box

Trachea: windpipe that leads from the throat

Bronchi: two large tubes at the end of trachea (bronchus is the singular or bronchi)

Bronchioles: thou sounds of small tubes in lungs

Alveoli: tiny elasticated cavities surrounded by capillaries to allow diffusion

Diaphragm: domed sheet of muscle which contracts to help us breathe in

Intercostal muscles : these are inters, and external and help move the rib cage up and down to breathe

Pleural membranes: double set of covering around the lung

Pleural fluid: allows membrane to stick together to stay with ribs

Cilla: hairs inside the trachea which gets rid of dirt branches, that come off. Goes down tranches helps remove mucus (by coughing) or redirect it into the digestive system.

Epiglottis: flap that stops food going down to the lungs when we swallow

Mucus: sticky slimy fluid that traps direct particles

Thorax: cavity in which lungs are found

Pathway

1) nasal cavity - warms air to body temp. Cilla and mucus filter the air to dust and pathogens

2)epiglottis- attached to the Laurence entrance: open when breathing closes whilst swallowing

3)Pharynx: throat. Connects the nasal cavity to the larynx and the mouth to the epiglottis

4) Larynx: voice box. Airway where sound is produced, and coughing in generated to remove foreign objects

5)Trachea: windpipe. Connects the larynx to the bronchi

6) bronchus:

7) bronchioles:smallest airway, take the air in the lungs to the alveoli

8) alveoli: