PROBLEM UNDERSTANDING B-Trees

[ayanda83]

template <class recType, int bTreeOrder>
struct bTreeNode
{
    int recCount;
    recType list[bTreeOrder - 1];
    bTreeNode *children[bTreeOrder];
};

The above code implements a B-Tree node. I don't understand what int recCount; is for. And also what each array does

recType list[bTreeOrder - 1];
bTreeNode *children[bTreeOrder];