All proteins are made of amino acids. There are 20 different amino acids in the human body. Testosterone and cholesterol are both steroids. There are at least three different types of cholesterol. Matrix material can only be found in muscles.
Tendons connect bone to bone , whereas ligaments connect muscle to bone .
Answers can be used more than once. Has a free, or open, surface. Goblet cells a. Connective Tissue b. None of the above 31.