The primary boundary is your skin, but almost every organ has some defense against germ infection.
The Ural Mountains
Lake Victoria acts as a boundary between Tanzania, Uganda, and Kenya. Another natural boundary between these countries is the Kagera River.
The teeth form the boundary between the buccal and lingual cavities.
The Ural Mountains serve as the boundary between Europe and Asia. They stretch over 1,550 miles from the Arctic Ocean to the Ural River.
True. The skin acts as a barrier against germs and also controls body temperature.
it can cause germs to spread or wrong acts
The Missouri River forms a boundary between the states of Missouri and Kansas. It serves as a natural border in the region, particularly in the area around the Kansas City metropolitan area. Additionally, it also acts as a boundary between Missouri and Nebraska at its northern end.
organelle
The Urals are a mountain range that acts as a boundary between Europe and Asia. It is the largest mountain range in Europe.
Your stomach
The top portion of the troposphere is known as the tropopause. It is characterized by a stable temperature gradient and acts as a boundary between the troposphere and the stratosphere above.
Skin