pathogens and physical barriers

Question 1

skin

Answer 1

primary physical barrier for the body ,has a tough outer layer that prevents pathogens from entering

Question 2

mucous membrahes

Answer 2

these line the bodys cavaties , like the respiratory digestive and urogenital tract .mucous memebranes produce , this sticky substance which traps pathogens , like in the respiratory tract cilla [tiny hair like substances] work in tandem with mucous membranes to move trapped pathogens out the airway

Question 3

cilla

Answer 3

they play an important role they move mucous which contains trapped particles and pathogens up towards the throat where it can then be sent to the stomach

Question 4

tears and saliva

Answer 4

both contain lysosomes which is a enzyme that breaks down bacterial cell walls ,thus providingb an additional layer of defense by killing bacteria before it can enter body

Question 5

stomach

Answer 5

due to the acidic enviroment of the stomach it destroys pathogens that enter via the mouth so it protects the body from infection via stomach bug