Chapter 9.1 & 9.2 Animals

POINT > Define animal characteristics POINT > Describe levels of organization in animals POINT > Describe how animals are classified POINT > Identify types of symmetry in animals

POINT > Describe animal characteristics All animals are multicellular All animals are heterotrophs Animal cells do not have a cell wall All animals move at some point in lifetime

POINT > Describe levels of organization in animals Animals vary from very simple to very complex We can describe 4 levels of organization: 1. Cellular organization: the most simple, just cells working together

POINT > Describe levels of organization in animals We can describe 4 levels of organization: 2. Tissue organization: a tissue is a group of similar cells working together for some function Ex. Muscle tissue, nervous tissue, liver tissue, skin tissue

POINT > Describe levels of organization in animals We can describe 4 levels of organization: 3. Organ organization: an organ is a group of tissues working together for some function Ex. Brain, heart, liver, eye, kidney, lung

POINT > Describe levels of organization in animals We can describe 4 levels of organization: 4. Organ system organization: an organ system is a group of organs working together for some function Ex. Circulatory system, digestive system, skeletal system

POINT > Describe how animals are classified Taxonomy: Kingdom Phylum Class Order Family Genus Species

CHECK: What are 4 characteristics of animals? What is a tissue? What is an organ system? What is an organ?

POINT > Identify types of symmetry in animals If something has symmetry, it can be divided into equal halves The line of symmetry is the line that divides the two halves

POINT > Identify types of symmetry in animals There are two types of body symmetry in animals: Radial symmetry Objects with radial symmetry have many lines of symmetry

POINT > Identify types of symmetry in animals Animals with radial symmetry include jellyfish, sea stars, anenomes, sea urchins

POINT > Identify types of symmetry in animals Animals with radial symmetry live in the water, are slow moving, and are not very complex

POINT > Identify types of symmetry in animals 2. Bilateral symmetry Objects with bilateral symmetry have only one line of symmetry

POINT > Identify types of symmetry in animals Most animals have bilateral symmetry

POINT > Identify types of symmetry in animals Animals with bilateral symmetry are more complex Sense organs and a more streamlined body allow animals with bilateral symmetry to move faster

CHECK: True or false. Animals with bilateral symmetry are usually more complex and move faster. What is an animal with radial symmetry? What is an animal with bilateral symmetry? Do most animals have radial or bilateral symmetry?

Homework: Read pages 294-302 Finish Study Guide S.A. #1-3 page 299 # 1-2 page 302 GRAS 123-128