Epithelial Tissue

Question 1

where can you find epithelial tissue

Answer 1

line any surface that is in contact with external environement

line surface of internal organs, such as lung

in lungs there are two types of epithelial tissue:squamous and columnar epithelium

Question 2

columnar epithelium

Answer 2

find in upper airway (trachea and bronchi) is mainly lined with ciliated columnar

these cells have lots of mitochondria

cilia move mucus away from lungs, preventing an inhaled particles causing infection

goblet cells produce mucus

Question 3

squamous epithelium

Answer 3

flat and thin egg shaped nuclei

often only one cell thick and very good for surfaces where diffusion occurs as in the lungs

Question 4

copd

Answer 4

chronic obstructive pulmonary disease

more common in smokers then non-smokers because substances in smoke damage lungs

cig smoke cause cilia of columnar epithelium to slow and stop beating then eventually die off, mucus builds up

this clogs airways causing more coughing that ruptures thin alveolar epithelial cells, destroying them. reducing surface area for gas exchange

further provides good environment for pathogen growth