Chapter 1 Section 1 Animals What is an Animal? Chapter 1 Section 1 Animals

Characteristics of Animals Multi-cellular Heterotroph Carnivore- eats meat Herbivore- eats plants Omnivore- eats meat and plants Reproduce Sexually Can move from place to place Cells are eukaryote Contains a nucleus Page 17

How Animal Cells are Organized Bodies composed of many cells Cells group together to form tissue A group of cell that perform a specific function Tissue may combine to form an organ A group of tissues perform more complex functions then a tissue alone Page 17

How Animal Cells are Organized Organs are made of four types of tissue Organ systems Different organs combine to form a system Page 17

How Animals Obtain Food Heterotroph Autotroph Can not make own food Must eat other organisms Animals are not autotrophs Animals eat autotrophs (plants)

How Animals Reproduce Sexual reproduction New organism forms from the joining of two sex cells Egg and sperm Fertilization When the sperm fertilizes the egg Offspring is a combination of both parents.

How Animals Move Movement related to: Obtaining food Escaping danger Reproducing Movement occurs at some point in their lives. Not necessarily as adult

How Animals Meet Their Needs Animals need Water Chemical reactions that keep them alive Food Raw energy for growth and activity Oxygen From air or water Must come from the environment Adaptation Characteristics that help an organism survive and reproduce in its environment

Adaptations for Getting Food

Adaptations for Getting Food

Adaptations for Getting Food

Adaptations for Escaping Predators Behavioral Pretending to be dead Structural Hard outer covering Stingers Taste bad Bad Smell Camouflage

Classification of Animals Scientists classify animals in to groups Each classification represents a shared characteristic. Broader classification Kingdom and Phylum More specific classification Species and genus Based on Structure of body How embryo develops DNA examination

Classification of Animals

Classification of Animals Important structural characteristic involves the spine Vertebrate Has a backbone Fish, amphibians, reptiles, birds, mammals Invertebrate Does not have a backbone Jellyfish, worms, snails, crabs, spiders and insects

Classification of Animals