WebThe bivalve shell is made of calcium carbonate embedded in an organic matrix secreted by the mantle. It has a simple nervous system; the head is absent. The digestive system … Webbivalve, (class Bivalvia), any of more than 15,000 species of clams, oysters, mussels, scallops, and other members of the phylum Mollusca characterized by a shell that is …
Mollusks Types, Characteristics & Examples - Study.com
WebEcology and habitats. The division and lateral compression of the shell into two valves is clearly related to the adoption of a burrowing mode of life, which is achieved by a muscular foot. Primitive forms were detritivorous, whereas modern bivalves are suspension feeders that collect food particles from seawater using ciliated ctenidia ... WebStudy with Quizlet and memorize flashcards containing terms like 1. Which one of the following incorrectly matches a molluscan structure with its typical function?, 2. Which of the following organs of cephalopods resemble those of the vertebrates?, 3. A biologist has been studying a mollusk that does not have a shell. It lives in the marine environment. Of the … chivalry 2 sound not working
Bivalve - Physiology Britannica
WebThe bivalve shell consists of three or more main layers : all bivalves have a thin outer uncalcified periostracum which is composed of conchiolin. The calcified part of the shell … WebOct 22, 2024 · The two types of seashells are univalves and bivalves. Univalves come from one-shelled mollusks such as snails or conchs. Bivalves come from two-shelled … WebAug 26, 2024 · Bivalves have a heart that lies within a membrane called a pericardium. The space the pericardium encloses is called the pericardial cavity. The bivalve heart is comprised of a central ventricle and two lateral auricles. ... The bivalve shell is secreted by various parts of the mantle. The mantle itself is attached to the shell by a series of ... chivalry 2 specs