What is an animal?
Keeping internal conditions stable
What is homiostasis?
Only one line of symmetry can be drawn to divide it into 2 mirror halves
what is bilateral symmetry?
an invertebrate that has an internal skeleton and a system of fluid-filled tubes
what s an echinoderm?
an animal that controls the internal heat it produces and regulates its own temperature
what is an endotherm?
develops inside its mother's body until its body systems can function independently
what is a placenta mammal?
A vertebrate
What is an animal with a backbone?
Made up of different tissues
What is an organ?
Invertebrates with soft, unsegmented bodies that are often protected by a hard outer shell.
What are mollusks
the backbone is made up of a stack of many small bones
What are vertebrae?
a vertebrate that is ectothermic and spent his early life in water and its adult life on land.
What is an amphibian?
Animals are classified by...
How closely related they are to other animals
Animals with bilateral symmetry have ...
organ systems
What is an endoskelton
vertebrates control their internal heat and maintain a constant...
body heat
born at an early stage of Life development they usually continue to develop in a pouch on the mother's body
What is a marsupial?
Structures and behaviors that allow animals to perform their functions
What is an adaptation
A group of similar cells that perform specific functions
What is a tissue?
Invertebrates with have stinging cells and take food into a central body cavity.
What are cnidarians?
A flexible rod that supports chordates back.
What is a notochord
tissue more flexible than bone
what is cartridge?
An invertebrate
What is an animal without a backbone?
Many imaginary lines are drawn through a central point to divide into 2 mirror images or more
What is radial symmetry?
Invertebrates that have Hard outer covering, segmented bodies, and pairs of jointed appendages
What are arthropods?
an animal that produces little internal body heat
what is an ectotherm?
vertebrae that have scaly skin and lungs and lay eggs on land
What is a reptile?