A.頭靜脈B.貴要靜脈C.大隱靜脈D.頸外靜脈E.門靜脈
A.灰質(zhì)B.纖維束C.神經(jīng)核D.神經(jīng)節(jié)E.網(wǎng)狀結(jié)構(gòu)
A.灰質(zhì)B.皮質(zhì)C.神經(jīng)核D.神經(jīng)節(jié)E.髓質(zhì)