Innate Immunity micro. ch.15 lecture 1 - Coggle Diagram
Innate Immunity micro. ch.15 lecture 1
pathogen can cause disease only if it can...
attach itself to host cell
evade the body's defense mechanism long enough to make harmful changes
resistance to most plant and animal pathogens
external barriers to pathogens (skin and mucous membranes)
internal, made of protective cells blood borne chemicals and processes that inactivate or kill invaders (Phagocytic WBC'S)
Lypmhocytes responding against species and strains of pathogens and alter body's defenses. Specific and have memory.
1st line of defense
mucous membranes of the respiratory, digestive, and reproductive system
when barriers are pierced, broken, or damaged, they become portal of entry for pathogens
epidermal dendritic cells
phagocytize and devour pathogens non-specifically and play role in adaptive immunity.
Give skin strength and pliability to prevents jabs and abrasians that could introduce microorganisms.
secreted by sebaceous glands
helps keep skin pliable and less likely to break or tear
lower skin pH to level 5 inhibitory to many bacteria
finds skin suitable environment for growth and reproduction
lines all body cavities open to environment. Lines lumen of the respiratory, urinary, digestive, and reproductive tract
thin, outer covering superficial or close to surface
structures that make and drain tears
tears evaporate or drain in small canals that empty into nose which empties into pharynx and swallowed
destroys bacteria and together with mucous traps microbes to remove them
protects the body by competing with potential pathogens especially in microbial antagonism