relating to or representing the physical distribution of parts or features on the surface of or within an organ or organism.
Function of the larynx
The larynx acts as an air passageway linking the pharynx with the trachea. It also acts as a sphincter to prevent food from entering the trachea and is the organ of phonation.
How many cartilages does the larynx consist of?
3 unpaired and 3 paired
How to differentiate bronchioles from bronchi?
Bronchi has cartilage.
Bronchioles don't have any cartilage only smooth muscle
• Site of gas exchange
• lined by extremely flattened (squamous) type 1 pneumocytes
– about 40% of cells but cover >90% of
• more-rounded type 2 pneumocytes secrete surfactant
– about 60% of cells but cover <10% of
– found esp. at the angles between adjacent septa
– function as stem cells
What is the main function of the lungs ?
The main function of the lungs is to oxygenate the blood by brining inspired air in close relation to blood vessels and permitting gaseous exchange.
What is the chief muscle of respiration?
Groove for aorta
Entrance to auditory tube
Ciliated columnar epithelial cell
Root of right lung
Root of left lung
Location of carina (internal ridge)