BIOL 2030 Lecture Notes - Lecture 3: Endoplasm, Protist, Myxozoa
Document Summary
The coelom- body cavities within bilateral animals coelom- uid lled cavity between outer body wall and gut. Enables internal organs to grown larger and become more sophisticated. Act as a hydrostatic skeleton, providing support for soft- bodied animals. Some animals also use this pressurized coelom for locomotion. Embryo germ layers: ectoderm- outside surface of embryo (gives rise to epidermis/ skin, mesoderm- middle (gives rise to a lot of the organs, endoderm- inside lining of the embryo (forms gut ie. esophagus, stomach etc, acoelomate. No true coelom (ie. no body cavity) Recall: parenchyma are cells that perform main function of the origin. Parenchyma for coelomate are cells of mesodermic origin in the space between ectoderm and endoderm where the coelom would be, but isn"t. Monday, january 11, 2016: pseudocoelomate possess a pseudocoel. Tube within a tube arrangement no peritoneum (ie. no cellular membrane derived from mesoderm: coelomate. Two methods of developmental formation (i) schizocoelus formation (ii) entercoelus formation.
