BIO 1130 : Cambrian and ordovician key words

• School: University of Ottawa
• Department: Biology
• Course: BIO 1130
• Professor: Jon Houseman

Document Summary

The body plan of bilaterally symmetrical organisms, which lack a coelom. There is no body cavity between the body wall and the gut. A layer of filamentous algae on the marine or fresh water soft bottoms. A mobile amoeba-like cell which is found in the body of inverterbrates. It is similar to white blood cells which is found in vertebrates. In many species amebocyes are found in the blood or body fluid, and plays a role in the defense against pathogens. In sponges; cells found in the mesophyl can transform into specialized types of cells. Once sperm enter the sponge, the amoebocye will help direct it to the egg to fertilize. Also, when nutrients are gathered by the choanocytes, they amoebocytes with transfer it to other parts of the sponge. Endoderm lined cavity of an embryo that forms the primitive gut.