Anatomy Flashcards
Describe the external nose
Above the eyebrows- root Between the eyebrows- bridge Top of the nose- Dorsum Tip of the nose- apex Side of the nose- Ala
Describe the cartilages and bones that make up the external nose
On the top- septal cartilage and nasal bone.
On the side- maxilla bone plus lateral cartilage.
Going down towards the apex- major and minor ala cartilage
Fibro.
Major and minor ala cartilage make up the Ala and at the bottom of these is fibre-fatty tissue.
What makes up the nasal septum?
Vomer bone inferiorly and perpendicular plate of ethmoid bone superiorly.
What are ethmoidal air cells and where do they lie?
Ethmoidal air cells are sinus’s and they are lateral to the concha.
How many concha does the nose have?
Three.
What bones do each concha belong too?
Superior and middle are both ethmoidal bone.
Inferior concha is a bone in its own right.
where does the sphenoid sinus drain too?
Sphenoethmoidal recess.
Where do the ethmoidal cells drain too?
Posterior ethmoidal cells- superior meatus
Anterior ethmoidal cells drain to the semilunar hiatus on the middle meatus.
Middle ethmoidal air cells- ethmoidal bulla on middle meatus.
Where do the frontal sinus’s drain too?
Middle meatus
Where do the maxillary sinus’s drain too?
Middle meatus
Where do the nasolacrimal ducts drain too?
Inferior meatus.
Where is the sphenoethmoidal recess?
Above the superior concha.
What sort of mucosa lies at the nasal vestibule?
Stratified squamous epithelium that is non-keratinised.
What sort of mucosa is at the top of the nasal cavity?and what is its function?
Olfactory epithelium
Allows you to smell.
What sort of mucosa lies at the back of the nasal cavity?
Respiratory epithelium- contains cilia that allow you to beat mucus towards the pharynx.