Presentation on theme: "4/21 1.What do all animals have in common? 2.In your field guide define – Asymmetry – bilateral symmetry – radial symmetry – parasite – open circulatory."— Presentation transcript:
4/21 1.What do all animals have in common? 2.In your field guide define – Asymmetry – bilateral symmetry – radial symmetry – parasite – open circulatory system – closed circulatory system – invertebrate – vertebrate.
3/11 1.What phylum do the animals in the pictures belong to? 2.What type of symmetry does it have? 3.How does the top picture differ from the bottom picture? 4.What is the body type of each? 5.Explain how they eat? 6.What are nematocysts? 7.What are porifera? 8.How are cnidarians and porifera different?
1.What kingdom do each of the cells below belong to? 2.What are the two on the left? 3.What are the arrows pointing to? 4.What are the characteristics of animals? 5.What are the two major divisions of animals? 6.What are the major phyla of animals? 7.What one are we in?
Two Divisions InvertebrateInvertebrate- Animals without a backbone About 95-97% of animal species are Invertebrate VertebrateVertebrate- Animals with a backbone
Types of Symmetry AsymmetricalAsymmetrical- No symmetry: irregularly shaped RadialRadial Symmetry Symmetry- Body parts radiate from center- wheel like symmetry BilateralBilateral Symmetry Symmetry- two similar halves: right and left side are identical!
Types of Circulatory System OpenOpen Circulatory System- Simple heart pumps blood through vessels that empty into spaces in the animal’s body ClosedClosed Circulatory System- Heart circulates blood through a network of blood vessels that form a closed loop
Reproduction: Asexual Reproduction: Process by which a single organism produces a new organism Sexual Reproduction: Process by which an organism forms from the joining of an egg and a sperm cell
Regeneration- The ability to grow back lost parts Parasite-an organism that lives on or in another organism,the host, and gets its nutrition. It causes harm to that organism Budding- A type of asexual reproduction, where a piece of the organism is capable of developing into a new individual.
Porifera = think pores
Porifera Classified as an animal because it is a consumerClassified as an animal because it is a consumer The simplest animalThe simplest animal
Habitat:88% live in salt water!
Asymmetrical: NO SYMMETRY
Body Plan: Sponges have no “gut” Collar -Collar cells cells inside the sponge trap and digest the food. -Waste exits through osculum
Skeleton: Made of spongin and SPICULES
Reproduction Sexual Sexual—Female egg and male sperm Asexual by regeneration and budding
Phylum : Cnidarians
Live in freshwater and salt waterLive in freshwater and salt water Radial symmetry Radial symmetry
others attach to a surface and do not move (sessile) others attach to a surface and do not move (sessile) Some are capable of movement Some are capable of movement
BODY PLAN BODY PLAN SIMPLE NERVOUS SYSTEM SIMPLE NERVOUS SYSTEM “ Nerve net” “ Nerve net”
BODY PLAN cont… BODY PLAN cont… Hollow central cavity with only one opening ( mouth ) Hollow central cavity with only one opening ( mouth )
TWO Body Forms: TWO Body Forms: polyp (vase-shaped; tentacles project up) polyp (vase-shaped; tentacles project up) medusa (bowl-shaped; tentacles hang down) medusa (bowl-shaped; tentacles hang down)
Have tentacles with specialized cells called nematocysts ( Stinging cells ) Have tentacles with specialized cells called nematocysts ( Stinging cells )
FEEDING: Use nematocysts to stun or kill prey. Use nematocysts to stun or kill prey. Use tentaclesto capture prey and pull it into the mouth Use tentacles to capture prey and pull it into the mouth
REPRODUCTION: REPRODUCTION: both sexual and asexual Asexual = Budding Asexual = Budding