Popatrzcie na swoje ręce i usta przed wyjściem z domu.

Popatrzcie is the imperative form of popatrzeć. It means look or take a look and is used when speaking to more than one person.

Related forms:

• popatrz = say it to one person informally
• popatrzcie = say it to several people

So the sentence is giving a command or instruction.

This is about aspect, which is very important in Polish.

• patrzeć is imperfective: looking, watching, keeping your eyes on something
• popatrzeć is perfective: take a look, look once, look for a moment

Here the speaker means a single, deliberate action before leaving, so popatrzcie fits better than patrzcie.

A rough contrast:

• Patrzcie na to! = Look at this! / Keep looking at this!
• Popatrzcie na to! = Take a look at this!

Because popatrzeć normally takes na + accusative when it means look at something.

So:

• popatrzeć na ręce
• popatrzeć na usta

This is just the standard verb pattern you need to learn:

• patrzeć na
• popatrzeć na
• spojrzeć na

Because Polish usually uses the reflexive possessive swój when the owner is the same as the subject of the sentence.

Here, the people being told to look are also the people whose hands and mouth/lips are meant. So Polish prefers:

• Popatrzcie na swoje ręce... = Look at your own hands...

Using wasze is possible in some contexts, but it often sounds more contrastive, as if you are stressing your hands rather than someone else’s.

Very roughly:

• swoje = one’s own
• wasze = your, with more emphasis or contrast

They are in the accusative plural, because na after popatrzeć requires the accusative.

So:

• ręce = accusative plural of ręka
• usta = accusative plural of usta

In practice, these forms look the same as the nominative here, which is very common in Polish.

In Polish, usta is normally a plural-only noun. It refers to the mouth/lips area, and everyday Polish uses the plural form.

So:

• usta = mouth / lips, depending on context

That is why swoje ręce i usta is perfectly normal Polish, even though English would usually use the singular mouth.

It can suggest either, depending on context.

In many situations, usta refers to:

• the mouth as a visible part of the face
• the lips

So if you translate very literally, you may hesitate between mouth and lips. Polish speakers often do not separate those as sharply in everyday usage with usta as English does.

It means before leaving the house/home.

It breaks down like this:

• przed = before
• wyjściem = leaving / going out / departure
• z domu = from the house / from home

The key point is that przed here is followed by the instrumental case, so:

• wyjście becomes wyjściem

So this is a very typical Polish structure:

• przed + noun in the instrumental

Because after przed in this time expression, Polish uses the instrumental case.

So:

• basic form: wyjście
• after przed: przed wyjściem

This is similar to other expressions:

• przed obiadem = before lunch
• przed snem = before sleep / before going to sleep
• przed wyjściem = before leaving

Because z here means from, and z in that meaning takes the genitive case.

So:

• dom → domu after z meaning from
• z domu = from the house / from home

By contrast:

• z domem would use the instrumental and would mean with the house, which does not fit here

So wyjściem z domu literally means leaving from the house/home.

Yes. That would be a very natural alternative.

Compare:

• przed wyjściem z domu = before leaving home
• zanim wyjdziecie z domu = before you leave home

The version with przed wyjściem is more compact and noun-based.
The version with zanim wyjdziecie is clause-based and can sound a bit more direct or conversational.

No, Polish word order is fairly flexible.

This version:

• Popatrzcie na swoje ręce i usta przed wyjściem z domu

is neutral and natural.

But you could also say:

• Przed wyjściem z domu popatrzcie na swoje ręce i usta

That puts more emphasis on the time part: before leaving home.

So the original order is not the only possible one, but it is perfectly normal.