Standard precautions apply to
1. blood
2. all body fluids, secretions, and excretions
3. intact and nonintact skin and
4. mucous membranes.

Standard precautions apply to blood, intact and non intact skin, mucous membranes and all body fluids, secretions and excretions except sweat regardless of whether they do or don't contain blood.

Explanation:

Standard precautions are the set of rules which are basically  meant for controlling the infection used to prevent the spread of disease that can be acquired through  or when in contact with person with blood, body fluids, non intact skin( including rashes) and mucous membranes.

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explanation:

the sun shines white and black light to our planet. the white light has all the colors in it. in our upper atmosphere, we have dust particles and oxygen molecules. the white light meaning all of the colors in a rainbow shines through the upper levels of the atmopshere and the blue light scatters across the entire planet. that is why our sky is blue.