Gdz Biologiia 7 Sumatokhin Klass Dvukhstvorchatye Molliuski May 2026

: Consists of two symmetrical valves connected by a flexible ligament and a "lock" (hinge).

: Species like oysters, mussels, and scallops are important food sources for humans and marine life. gdz biologiia 7 sumatokhin klass dvukhstvorchatye molliuski

: The body is laterally compressed and divided into two main parts: the trunk and the wedge-shaped foot . Unlike gastropods, bivalves lack a head, tentacles, and eyes. : Consists of two symmetrical valves connected by

: Like most mollusks, they have an open circulatory system where the heart pumps blood into the body cavity. Internal Anatomy Summary Characteristic Digestive Unlike gastropods, bivalves lack a head, tentacles, and eyes

Урок 2: Классы моллюсков - Ростелеком Лицей

: They are filter feeders . Water enters through an inhalant siphon, passes over the gills where food particles are trapped, and exits through an exhalant siphon.

Mouth (near the foot), stomach, liver, and intestine. They lack a radula (grating tongue). Plate-like gills (ctenidia) located in the mantle cavity. Excretory Two kidneys that open into the mantle cavity. Nervous Simplified, consisting of three pairs of ganglia. Ecological and Economic Importance