MolluscaAndrew An, Fahad Khan, Spencer Fang, Samuel Kim

Habitat

• Generally live in marine environment, but can be found virtually everywhere

• Some can also be found by hydrothermal vents

Respiratory System

• Uses gills to filter in dissolved oxygen• Gills in direct contact with water

Reproduction

• Reproduces by using water as a medium to deliver sperm to the female

• Then the female siphons the sperm and fertilizes her eggs

Circulatory System

• Sends oxygen straight from the heart into the spaces in the tissue, known as hemocoel

Skeleton and Appendages

• Have an interior shell, mainly chitin and conchliolin, protein

• Have 5 pairs of appendages

Segmentation

• They have segmentation because they have specific parts of the body that has specific functions.

• Three main part of a molluscan body: foot, visceral mass and a mantle

Cephalization

• Varies but the most advanced is the squid which is about as intelligent as a domestic cat

Coelom

• Coelom is a fluid filled cavity that develops with the mesoderm

• They possess a coelom that functions as a hydrostatic skeleton

Digestive Tract

• They have a two ended digestive tract with mouth and anus

• Releases wastes into the water

Symmetry

• They have bilateral symmetry

Germ Layer

• Mollusca are triploblastic so they have 3 germ layers• The three layers consist of ectoderm, mesoderm and

endoderm