The skin and mucous membranes provide living things with physical and chemical barriers against invasion of microbes. These membranes are part of the immune system.
There are two natural barriers that inhibited invasion but did not totally prevent it. They are the Sahara Desert to the west & the Mediterranean Sea to the north.
Chemical Invasion was created in 1987-10.
There are multiple chemical barriers present in the body. The sebum of the skin, the lactimal secretions of the eye, the gastric acid of the stomach and the urinary acids of the urinary bladder are all examples of chemical barriers to infection.
Because the high temperature kills the microbes.
Natural barriers are geographical features that provide obstacles.
One of japans natural barriers is that japan is very mountainous. This could also be good for japan in case of a foreign invasion.
Some barriers were the surround city there were three ways and side that India had because of being surrounded by water on 3 sides there barriers would stop invasion THis was Luis who gave this answer
Bannas apples and weewees
there were no geographical, or natural, barriers-the land was flat-it was easy for invaders to come in and attack Mesopotamia
Natural barriers refer to geographical features such as mountains, rivers, deserts, or oceans that act as obstacles to movement or invasion by humans or other species. These barriers can provide protection from outside threats and can also influence the distribution of flora and fauna in an ecosystem.
Dry rot is a type of funal invasion against wooden structures.
The Sahara Desert was not a geographic barrier that made invasion of the Indian subcontinent more difficult. Geographical barriers like the Himalayas, the Thar Desert, and the Indian Ocean limited access and made invasion challenging.