2 Multicellular Eukaryotic with no cell walls Heterotrophs (consumers) ~ Characteristics ~MulticellularEukaryotic with no cell wallsHeterotrophs (consumers)
3 ~ Characteristics ~Have a nervous system to respond to their environmentLocomotion relates to ability to obtain foodMost animals develop from a zygote becoming aA single layer of cells surrounding a fluid-filled space forming a hollow ball of cells called a gastrula.
4 ~ Developmental Characteristics ~ The gastrula is made up of three parts:Ectoderm, a layer of cells on the outer surface of the gastrula, grows and divides developing into skin and nervous tissue.Endoderm, a layer of cells lining the inner surface of the gastrula, develops into the lining of the animal’s digestive tract.Mesoderm, made up of two layers of cells lying between the ectoderm and endoderm, forms muscles, reproductive organs and circulatory vessels.
6 ~ Developmental Characteristics ~ Animals that develop a mouth from the indented space in the gastrula are protostomes.Animals that develop an anus from the opening in the gastrula are deuterostomes.
8 ~ Body Plans ~ Animals that are irregular in shape are asymmetrical. Animals that are regular in shape are symmetrical.
9 ~ Body Plans ~An animal has radial symmetry if it can be divided along any plane, through a central axis, into equal halves.An animal has bilateral symmetry if it can be divided down its length into similar right and left halves forming mirror images of each other.
10 Which figure has bilateral symmetry? Which has radial symmetry?
11 ~ Body Plans ~Acoelomates – animals have three cell layers with a digestive tract but no body cavities.Pseudocoelomates – animals with a fluid-filled body cavity partly lined with mesoderm.Coelomates – animals with a body cavity completely surrounded by mesoderm.
13 ~ Protection and Support ~ Though not all animals have a skeleton, those that do can be divided into two groups:Those with an exoskeleton – a hard, waxy coating on the outside of the body that protects internal organs, provides a framework for support, and a place for muscle attachment.Those with an endoskeleton – support framework within the body that protects some organs and a brace for muscles to pull against.
14 ~Invertebrates~ 8 main phyla No backbones 95% of all animals are in this group
15 ~Invertebrate Phylum Porifera~ Spongessimplest form of animal lifelive in waterDo not move aroundno symmetryPores (holes) all over body5000 species
16 ~Invertebrate Phylum Porifera~ Filter Feeders: a sponge filters particles of food from water using collar cells and then pumps the water out the osculum.
43 ~Invertebrate Phylum Arthropoda ~ Subphylum Chilicerata Class MerostomataHorseshoe crabsAncient group of speciesChanged little over 350 million yearsAquatic, mostly found on Atlantic & gulf coasts of United States.
45 ~Invertebrate Phylum Arthropoda ~ Subphylum Chilicerata Class PycnogonidaSea spider
46 ~Invertebrate Phylum Arthropoda ~ Subphylum - Crustacea 5 ClassesAquatic ones have gills2 antennae2 body regions or segmentedShrimp, lobsters, crabs, barnacles, isopodsMany species taste delicious in butter