Basic medical science contains many different branches, I think you can find a separate website for each

- BMJ best practice

- NEJM Resident 360

You can't go wrong with UpToDate (uptodate.com). It's an incredible source of recent information on basic science and it's irreplaceable with clinical practice as well.

It's subscription-based but well worth the price. Alternatively, you can check if your university provides students with access to it.

Hope this helps.

Thanks all Aleksander Adamiec , Ali Faris Altebainawi , Abdulkarim Hasan