protonephridia

美 　英

• 網(wǎng)絡原腎管

例句

Protonephridia are present in many flatworms and are involved in osmoregulation. A primitive brain and nerve cords are present.

原腎管存在于許多扁形動物，并涉及滲透調(diào)節(jié)。原始的大腦和神經(jīng)索存在。