EDU 5661 Lecture Notes - Lecture 6: Skeletal Muscle, Pleural Cavity, Abdominal Cavity

• School: University of Ottawa
• Department: Education
• Course: EDU 5661
• Professor: Jane Okumari

Document Summary

Structure of the respiratory system: (picture from http://www. google. co. uk/imgres?imgurl. Nasal cavity: the nose is split into the external nose and internal nasal cavity, When breathing in air enters the cavity by passing the nostrils, within the nostrils hairs filter out dust and other particles before the air passes into the two passages of the nasal cavity. Then the air is warmed up and moistened before it passes into the nasopharynx. A sticky mucous layer then traps smaller foreign particles which small hairs known as cilia transport to the pharynx to be swallowed. Epiglottis: this is a small flap of cartilage at the back of the tongue, the epiglottis closes the top of the trachea when you swallow to ensure food and drink pass into your stomach and not your lungs. Pharynx: this is funnel shaped and connects the nasal cavity and mouth to the larynx and oesophagus (the throat). The pharynx is a small tube that measures approximately.