如图是桃花的剖面图,根据图回答下列问题:(1)①叫做______,内生______;②叫做______.①和②合称为______.(2)③叫做______.(3)⑤叫做______;⑦叫做______;⑧叫做______;⑨叫做______,内生______.⑦⑧⑨合称为______.