After all the little skull and cross bones

Mom: Blood. My finger was pricked by the needle. Could you give me that

iodine to put on my finger? It's the yellow stuff in the cupboard. Oh, no.

That's the rat poison.

Boy: Rat poison?

Mom: Yes, for killing rats. You don't even have to read the label to know

that it's poison. Just look at the picture.

Boy: What is this?

Mom: A skull and cross bones. It's a sign for death. Whenever you see a skull

and crossbones on something, you know it contains a deadly poison.
.
.
Boy: Now, after all the little skull and cross bones, the poisonous stuff on this

shelf and all the medication on this shelf.

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What does "after all" mean in this sentence?

Does it mean "considering"?

Thank you