E-o3 Crossword
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
 
 
Down: 1) organs in the chest that are the main organs of the respiratory system 2) a structure that carries out a specific job in the cell5) A organ that makes bile, a liquid that helps break down fat.6) breaking food into smaller pieces8) a process in which bacteria in soil change nitrogen gas into nitrogen compounds that are usable by other living things. 9) the death of huge numbers of species in a fairly short period of time.11) the organ system that works with the skeletal system to move the body , and helps pump blood through out the body.13) a change in a gene or chromosome. Across: 3) a nerve cell4) a diagram that cat can be used to show how the parts of a system are related to each other 7) a group of tissues that work together to perform a task.10) the process by which organisms best suited to their environments survive12) organelles that provide energy to cells by carrying out cellular respiration 14) a symbiotic relationship were both species benefit.15) tough fibers that connect bones to each other at joins16) anything that limits the number of individuals that can live in an ecosystem.17) a body system that controls and coordinates body functions and responses to stimuli
 

 

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