Which type of innate barrier does the Stratum | vedclass

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(A) The human immune system consists of various innate barriers that prevent the entry of pathogens. $1$. Physical barriers: The skin is the primary p

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Physical barrier

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(A) The human immune system consists of various innate barriers that prevent the entry of pathogens. $1$. Physical barriers: The skin is the primary physical barrier. The $Stratum$ $corneum$ is the outermost layer of the epidermis,which acts as a physical wall to prevent the entry of microorganisms. $2$. Physiological barriers: These include acid in the stomach,saliva in the mouth,and tears from the eyes,which prevent microbial growth. $3$. Cellular barriers: These include leukocytes like $PMNL$-neutrophils,monocytes,and macrophages that phagocytose pathogens. $4$. Cytokine barriers: These include proteins like interferons secreted by virus-infected cells to protect non-infected cells. Therefore,the $Stratum$ $corneum$ is a physical barrier.

Which type of innate barrier does the $Stratum$ $corneum$ represent?

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