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Animal systems

Across
Sends blood
Can function as both male and female
Nerve cells
Movement of substances from an area of high concentration to an area of low concentration
Reaction to a stimulus
Provide support in Phylum Porifera
Circulatory system where blood circulates entirely in vessels
Area of gas exchange in mammals
Fluids held within a body cavity
Organs that exchange gases between blood and air
Waste product of respiration
State of balance between systems
Part of nervous system in invertebrates
Body temperature depends on environment
Excretory mechanism of aquatic animals
Receives blood
Down
Thinking area of brain
Body temperature is self regulated
Hard physical protection used by invertebrates
Allows for genetic variety in a population
Circulatory system with organs to pump blood through vessels into a system of cavities
Allow for movement of many parts in vertebrates
Ammonia converts to this in mammals
Release hormones to allow body systems to interact
Obtains nutrients by filtering materials
Information to which an organism reacts
Dramatic changes in shape and form
Produces body cells
Reproduction requiring only one parent
Structural support system inside a body
Separate wastes and water from blood
Respiratory openings in insects
Produces sex cells
Filter body fluids of land invertebrates
Hollow muscle that pumps blood
Feathery structures that expose a large surface area of thin, selectively permeable mebrane to water
Neurons that carry directions