瓣鰓綱鰓瓣的基本構造·每個鰓瓣由2個片狀的鰓小瓣，稱為內鰓小瓣和外鰓小瓣·每個鰓小瓣又由背腹方向縱行的許多鰓絲通過絲間聯繫連線而成，絲間聯繫上的小孔稱鰓小孔·鰓小瓣前、後端及腹面三面癒合，內面圍成的腔稱鰓腔，腔內有許多垂直的縱隔連線內鰓小瓣和外鰓小瓣，鰓腔的背面通鰓上腔·鰓絲表面具纖毛，內有血管及支持用的角質桿·水流入外套腔後，經鰓小孔入鰓腔，向背面至鰓上腔，向後流動經出水管排出體外。
GOOGLE英文翻譯:Lamellibranchiata basic structure of the gill flap. Each of the gill flap from two sheets of the gill flap, known within the gill flap and the outer gill flap. Each gill flap and again by a dorsal longitudinal direction of many of the gill wire through the wire connection between the contact is made between the contact wire on the gills of small holes called pores. gill flap before the back-end and the ventral three healing, surrounded inside the gill cavity, said cavity, there are many vertical cavity mediastinal connections inside the gill flap and the outer gill flap, gill cavity on the back-pass gill cavity. gill surface with cilia, which are blood vessels and support the use of the keratin rod. water flows into the jacket cavity, the small hole into the gill cavity through the gill to the to the gills on the back of the chamber, back flow through the outlet pipe body.
