Chapter 4 - From Cells to Organ Systems Crossword
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
 
 
Down: 1) (outside or outward) secrete their products into a hollow organ or duct2) made up of various proteins that hold cells together4) group of specialized cells that are similar in structure and that perform common fucntions5) epithelial tissues that are specialized to synthesize and secrete a product Across: 3) layer of nonliving extracellular material that anchors epithelial tissue to the underlying connective tissue6) sheet cells that line or cover various surfaces and body cavities7) (within) secrete substances called hormones into the bloodstream
 

 

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