{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Lab11_Mollusca_Annelida

Lab11_Mollusca_Annelida - lab10 lab11 lab12 lab13...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
1 lab10 lab11 lab12 lab13 Coelomates • Bilateral symmetrical • Have a coelomic body cavity surrounded by mesoderm and containing complex systems of organs and compartments. • Protostomes (phyla Mollusca, Annelida , Arthropoda) – Well-developed nervous, circulatory, excretory, reproductive, and digestive systems. • Deuterostomes (phyla Echinodermata, Hemichordata, Chordata)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2 Phylum Molluska Mollusks such as snails, clams, octopuses, and squids Soft-bodied coelomates with a shell (may have no shell). External shells, remnant internal shell or no shell (e.g., octopuses). Coelomate of mollusks is often reduced to a small chamber surrounding the heart. Open circulatory systems have a few large vessels and a heart. Mollusks Body plan of mollusk shows little segmentation – Figure 38.2, 38.3 Head-Foot: ventral, muscular, highly modified foot for locomotion Visceral mass of organ systems and sensory structures Mantle (a specialized layer of epidermal cells that secretes shell) Calcium-based shell (occasionally absent)
Background image of page 2
3
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}