Want this question answered?
A barrier against diseases, injury, and infection
The (unbroken) skin is a natural surface barrier to infection. Then, first aid items such as pads, plasters and bandages, used with antiseptic creams or lotions.
Epithelial tissues
humans!
Skin.
no
How does mutation that protects some humans from HIV infection arose?
In humans, no - the skin is an impermeable barrier to air.
A barrier... in humans that would be your skin.
Serves as a physical barrier to keep pathogens out.
Humans do lots of bad things to hurt the reef. Mainly humans!
no but it can cause infection