with my limited knowledge, I see blockchain like this:
the whole blockchain as a big ledger book keeping records of all bitcoin transactions
each block can be seen as an entry of journal in the book containing confirmed transactions at specific time
subsequent block consists of new set of utxo as the results of used utxo in previous blocks <~ block chaining
every participant/node in the network keeps their own book and re-verify the transactions <~ decentralized/distributed
eventhough they keep their own records, they still have to follow the consensus/majority rules