ANIMAL CHARACTERISTICS  Multicellular  Some reproduce sexually, while others reproduce asexually  They are mobile (they can move)  They are heterotrophic (consumers)  Have well developed organs  Divided into two groups 1.Vertebrates: animals with a backbone 2.Invertebrates: animals without a backbone

HOW ARE ANIMALS LIKE PLANTS?  Both are multicellular, eukaryotic organisms  Undergo cellular respiration to produce energy During cellular respiration, the mitochondria take glucose and oxygen and change them into energy, water, and carbon dioxide  Both respond to environmental stimuli

VERTEBRATES  Animals that have a skull and backbone are called vertebrates.  Vertebrates can be divided into two groups Endotherms : warm blooded animals; their body temperature stays the same no matter what the temperature of the environment is Ectotherms: cold blooded animals; their body temperature changes with the temperature of the environment

BODY PLANS  Most animals have a balanced arrangement of parts. This is called symmetry.

BILATERAL SYMMETRY  Bilateral symmetry means that the animal’s body can be divided into right and left halves which are nearly mirror images of each other.  Animals that have bilateral symmetry only have 1 line of symmetry.

RADIAL SYMMETRY  Animals that have radial symmetry (think radius) have body parts that are arranged in a circle around a center point.  Any line drawn through the animal’s center can divide it into two symmetrical halves.

ASYMMETRY  Animals with no definite shape are said to have asymmetry.  You cannot draw any lines of symmetry through the animal.

MOVEMENT  Animals have different ways of moving.  The most common structures used for movement are feet, fins, and wings.  Some animals have very specialized structures for movement. Starfish use structures called tube feet. Squid and octopi use tentacles for movement.

RESPIRATION  Respiration is the process of obtaining oxygen.  Fish use gills to obtain oxygen.  Most other vertebrates obtain oxygen by using lungs.

REPRODUCTION  Some produce asexually. Budding: a new organism grows out of the body of the parent  Others produce sexually. External fertilization: fertilization takes place outside the body of the female requires a wet environment in order for the sperm to fertilize the egg Internal fertilization: fertilization takes place inside the body of the female

RESPONSE TO THE ENVIRONMENT  Animals have well developed nervous systems that allow them to respond to their environment.

DEVELOPMENT  Animals go through a variety of developmental stages.

COMPLETE METAMORPHOSIS  During complete metamorphosis, the fertilized egg becomes a larva, which then changes into a pupa. The adult emerges from the pupal form.  Butterflies undergo complete metamorphosis.

INCOMPLETE METAMORPHOSIS  During incomplete (gradual) metamorphosis, the fertilized egg becomes a nymph, which looks like a smaller form of the adult. The nymph, after a series of developmental changes, becomes an adult.  Grasshoppers undergo incomplete metamorphosis.

EXIT SLIP  Answer the following questions on a sheet of paper. Make sure your name is on your paper. 1.What is another name for cold-blooded? 2.What is another name for warm-blooded? 3.What type of symmetry do humans have? 4.What is one difference between plants and animals?