Can I send USD through PayPal?

Could you please clarify for me if it's possible to send United States Dollars (USD) directly through PayPal? I'm curious as to whether the platform allows for direct currency transfers of this type. Additionally, are there any restrictions or fees that may apply to such a transaction? As someone interested in using PayPal for both personal and financial transactions, it's important for me to understand its full capabilities and potential costs involved. Thank you for your time and assistance in answering this inquiry.