What Is An Animal?
The structures and behaviors that allow animals to perform their basic functions:
Adaptations
Organisms with this type of symmetry are organized simply, with some specialized cells but no tissues.
Asymmetry
Invertebrates with stinging cells and radial symmetry. They take food into a central body cavity.
Cnidarians
The backbone is made up of many smaller bones called this:
Vertebrae
(singular vertebra)
An organism that produces little internal body heat. Its body temperature changes with temperature changes in the environment:
Ectotherm
(A cold-blooded animal. Examples include reptiles like snakes, and amphibians like turtles.)
Name at least 4 different invertebrate groups of animals:
Sponges, Cnidarians, Flatworms, Roundworms, Segmented Worms, Mollusks, Arthropods, Echinoderms
The kind of symmetry that allows an animal to take in information about their surroundings from ALL directions:
Radial
Asymmetrical invertebrates with no tissues or organs:
Sponges
The flexible rod that supports a chordate's back during development:
Notochord
The name of a mollusk that has two shells and a simple nervous system:
(an example of a bivalve would be a clam because it has two shells)
Name at least 3 different vertebrate groups of animals:
Fishes, Amphibians, Reptiles, Birds, Mammals
The animal body plan with the most complex organization. Animals with this type of symmetry have complex organ systems.
Bilateral Symmetry
Organisms with a soft, unsegmented body, often protected by a hard internal or external shell:
Mollusks
An organism that controls the internal heat it produces and regulates its own body temperature:
Endotherm
(A warm-blooded animal. Examples include humans, rabbits, penguins, etc.)
Insects and birds both fly. Despite this similarity, why are they classified into different groups?
- They have different DNA
Animals are classified according to how they are related to other animals. Name at least two ways in which these relationships are determined:
- Animal body structure
- The way an animal develops
- DNA
The structure containing many of an organism's specialized sense organs, often found on the front side of a bilateral animal.
Head
The approximate percentage of organisms in the animal kingdom without a backbone
96% of animals are invertebrates
Name the three characteristics shared by all chordates:
Notochord, Nerve Cord, and Throat Pouches
These organisms all have exoskeletons and segmented bodies:
Arthropods
What are the four basic functions performed by animals?
- Obtain food/oxygen
- Keep internal conditions stable (homeostasis)
- Move in some way
- Reproduce
Name two different organisms with radial symmetry
Jellyfish (and other Cnidarians), Starfish (and other Echinoderms), etc.
Mollusks
(They have a soft, unsegmented body protected by a hard internal shell)
What are the three major parts of a vertebrate's endoskeleton and what do they each protect?
Skull protects the brain
Rib cage protects internal organs (heart/lungs)
Backbone protects the nerve chord (spinal chord)
Name at least 2 characteristics that birds share with mammals: