It is the skin or epidermis.
Rasputin!
no
How does mutation that protects some humans from HIV infection arose?
An artificial boundary is a boundary made by humans, examples include dams, the fence at the border between the U.S and Mexico. A natural boundary is a boundary made by nature, a boundary that "happens" naturally, examples include rivers, mountains and such.
The valves in the veins
No, chlamydia is a sexually transmitted infection that humans can get from other humans, not from cats.
no but it can cause infection
Vancomycin resistant enterococci, or VRE, is an infection that can occur in pigs. The importance of locating pigs that carry the VRE infection is pertinent to humans because it can cause serious illness to be transferred. The transfer of this infection occurs when humans consume pork from sick pigs.
the presence of a buffer
White Blood Cells fight infections in humans.
Cellulose is a starch made by plants; it is not made by staph infection.
If they have ravies, yes.