BIO153H5 Lecture Notes - Lecture 15: Taschen, Protostome, Diploblasty
Document Summary
Greatest phyla of animals is insects. Heterotrophs rely on feeding on other organisms. Move under their own power at some point in their life cycle. Consumers (occupy the upper levels of food chains in aquatic and terrestrial) Humans depend on wild and domesticated animals (food sources, companionship) Humans study their closest relatives to understand themselves. Have no cell walls but have an extensive extracellular matrix. Animals are the only lineage with muscle and nerve tissue. Adults of most species are diploid; only gametes are haploid. Difference in mouth and limbs for eating and moving. Most animals develop a body cavity (for organs) Seen in basal groups such as insects. The basic architecture of body is conserved. 4 features define an animal"s body plan. Animals are diploblasts (2 types of tissue or germ layers. Or are triploblasts (3 types of tissue) Animals have radial symmetry or bilateral symmetry. Starfish are radial (multiple planes of symmetry)
