Digestion what word?

1.     A group of cells with a similar structure all working together to do a specific job?

   The smallest amount of a living thing

The part of a cell where respiration is carried out

The type of tissue that produces chemicals like enzymes and hormones

The part of a cell that controls what can go in or out of a cell

The type of tissue that can contract to cause movement

The organ that makes bile

  The rate at which your cells do chemical reactions

The specific part of an enzyme that fits with a substrate

T he name of the enzyme that breaks apart protein molecules