Chapter 4 - Animals Flashcards
Homeostasis
Keeping internal body conditions stable
Adaptions
Structures and behaviors that allow animals to perform their functions
Vertebrates
Animals with a backbone
Invertebrate
Animals without a backbone
Cnidarian
Invertebrates that have stinging cells and take food into central body cavity
Mollusk
Invertebrates with soft, unsegmented bodies that are often protected by a hard shell
Arthropods
Invertebrates that have outer coverings, segmented bodies and pairs of jointed appendages
Exoskeleton
Outer skeleton
Echinoderm
An invertebrate that has an internal skeleton and a system of fluid-filled tubes
Endoskeleton
Internal skeleton
Chordates
Have a notochord, a nerve chord, pouches in the throat area and a backbone
Notochord
A flexible rod that supports a chordates back
Vertebrae
What the backbone is made up of
Ectotherm
An animal that produces little body heat
Endotherm
An animal that controls the internal heat it produces and regulates its own termperature
Fish
A vertebrate that lives in water and uses fins to move
Cartilage
A tissue more flexible than the bone
Amphibian
A vertebrate that is ectothermic and spends its early life in water and its adult life in land
Reptile
An ectothermic vertebrate that has scaly skin and lungs and lays eggs on land
Bird
An endothermic vertebrate that lays eggs and has feathers and a four-chambered heart
Mammals
Endothermic vertebrates that have skin covered with fur and hair, and a four-chambered heart
Mammary glands
Organs that produce milk
Monotremes
Lay eggs
Marsupial
Born at an early stage of development, and usually continue to develop in a pouch on the mothers body
