Thread: Call destructor from memory manager

Hi

I'm writing a memory manager and I wonder if it possible to call the destructor of an object (assuming I know it has one) from the memory manager?
The memory manager allocates a big chunk of memory and then divide it into smaller pieces as it recieves requests for allocations. Each piece of allocated memory is preceeded by a header which containes some data.

Would appreciate some help here

Regards
Daniel