Callous is another way to say it
        
                    
             
        
        
        
Answer:
In a free-body diagram, a box is used to represent the object, and arrows (the forces) are drawn outward from its sides. 
Explanation:
Once you put all of this together, it's pretty simple to figure out which forces are acting on any given object.
 
        
                    
             
        
        
        
Lactase an carbonic anhydride are examples of what type of substance is enzymes.
 
        
             
        
        
        
Saturated fatty acids are chains of single bonded carbons surrounded by hydrogen atoms. 
Unsaturated fatty acids have bent structures due to double bonding between carbon atoms in the chain. When carbons create double bonds with each other they are no longer able to hold as many hydrogens as a saturated fatty acid
        
             
        
        
        
Answer:
Chemical digestion involves the secretions of enzymes throughout your digestive tract. These enzymes break the chemical bonds that hold food particles together. This allows food to be broken down into small, digestible parts.
Explanation: