WHAT IS AN ANIMAL?!??!?!??!?!?!???? Flashcards
INVERTEBRATES
Animals without a backbone
VERTEBRATES
Animals with a backbone
Homeostasis
Keeping internal body conditions stable
Adaptations
Structures and behaviors that allow animals to perform their functions are called
Tissue
A group of similar cells that performs a a specific function
Organ
Made up of different tissues
Radial symmetry
An animal has radial symmetry if imaginary lines can be drawn through a central point to divide it into 2 mirror images
Bilateral symmetry
An animal has bilateral symmetry if only one one of symmetry can be drawn to divide it into halves that are mirror images
Cnidarian
Invertebrates that have stinging cells and take food into a central body cavity
Mollusk
Invertebrates with soft, unsegmented bodies that are often protected by a hard shell
Arthropods
Invertebrates that have a hard outer covering, segmented bodies, and pairs of jointed appendages
Exoskeleton
Outer skeleton
Echinoderm
An invertebrate that has an internal skeleton and has a system of fluid-filled tubes
Endoskeleton
An internal skeleton
Chordates
Members of the chordata phylum
Notochord
A flexible rod that supports a chordates back
Vertebrae
Singular vertebra
Ectotherm
An animal that produces little internal body heat
Endotherm
An animal that controls the internal body heat it produces and regulates
Fish
Vertebrate that lives in water and uses fins to move
Cartilage
A tissue more flexible than bone
Amphibian
A vertebrate that is ectothermic and spends its early life in water and its adult life on land
Reptile
An ectothermic vertebrate that has scaly skin and lungs and lays eggs on land
Bird
An endothermic vertebrate that lays eggs and flies
Mammals
Endothermic vertebrates that have skin covered in fur or hair
Mammary glands
Organ that lets mammals produce milk
Monotremes
Lay eggs
Marsupials
Usually develop in a pouch on the mothers body
Placental mammal
Develops inside its mothers body until its body’s system can work independently
Placenta
Materials are exchanged between mother and embryo through the placenta