Question

Identify the attributes of the skin that make it an effective barrier against pathogens. N hosts symbiotic microbes that crowd the surface and prevent infection has permanent, armor-like cells layered about two hundred cells thick has epidermal white blood cells that deter microbial colonization ongoing regeneration of tough, elastic keratin-rich epidermal layer production of antibiotic chemical agents by the sweat glands

Answer 1

ongoing regeneration of tough , elastic keratin rich epidermal layer.

keratin protein resist the entry of the pathogen. keratin provide the mechanical support and resistance against the bacteria.

skin act as a  physical barrier which is the most important first line defence against the pathogen. This is the part of the humoral immunity.