BIO2231 Chapter Notes -Esophagus, Blastomere, Organelle
Document Summary
Organ level of organisation level of complexity where organs operate together. Bilateral symmetry property of being divisible into symmetrical halves on either side of a body. Acoelomate without a coelom, as in flatworms and proboscis worms. Cilia may be used in moving particles along the cell surface. Pharynx part of the digestive tract between the mouth cavity and the oesophagus. Membrane-lined cavity behind the mouth, connecting to the oesophagus. Triploblastic pertraining to metazoan in which the embryo has three primary germ layers. Having a body derived from three embryonic cell layers (germ layers); ectoderm, mesoderm and endoderm. Cephalisation evolutionary process by which sensory organs and specialized appendages become localized in the head end of animals. The concentration of sense organs, nervous control etc. At the anterior end of the body, forming a head and brain. Dorso-ventral denoting, or extending along an axis joining the dorsal and ventral surfaces.
