BSC 2011 Lecture 1: Animals Week 1

5 Pages
Unlock Document

Biology - Biological Sciences
BSC 2011
Norman A Douglas

Animals Week 1 Lectures 1, 2, and 3 Characteristics of Animals Multicellularity Heterotrophs Internal digestion Motility Synapomorphies Unique junctions between cells Extracellular molecules such as collagen and proteoglycans Similarities in Hox and other genes Sponges lack: two embryonic cell layers nervous system All animals other than sponges called Eumetozoans Eumetozoans are dipoblastic (have two distinct cell layers) or tripoblastic (three layers) Dipoblasts: Ctenophores, Placozoans, and Cnidarians Symmetry: Cell layers: Tripoblasts Symmetry: Cell layers: Cephalization: formation of a head Can be thought of as a tube within a tube Development starts with a: Two major types o Protostomes: Molluscs, worms, arthropods o Deuterostomes: Echinoderms, hemichordates, CHORDATES Atoms molecules marcomolecules cells tissues organs organ systems As animals develop, groups of cells specialize into tissue types: 1. 2. 3. 4.
More Less

Related notes for BSC 2011

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.