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Making Fake Snot!

Molecules, as you may already know, are groups of atoms bonded together. Water, or H2O, is a molecule made of two hydrogen atoms and one oxygen atom. The oxygen gas we inhale (O2) is a molecule made o ...

Barriers to Pathogens, basi? At grade

Explains the body's first line of defense against pathogens, such as the skin and body fluids.

It is an educational content of CK-12 Foundation (to access some of the CK-12 contents you must be logged ...

Barriers to Pathogen? At grade

Describes barriers that keep most pathogens out of the human body.

It is an educational content of CK-12 Foundation (to access some of the CK-12 contents you must be logged in).

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