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-By helping to maintain fluid balance, proteins prevent **edema** (accumulation of fluid in tissues
-
+Proteins are large, complex, organic molecules made up of **amino acids**.
+	- Contain carbon, hydrogen, oxygen, and nitrogen
+	- Found in plants, animals, bacteria, and viruses
 - Proteins also help maintain acid-base balance.
 	- Maintaining the proper pH of body fluids
-	- Act as a **buffer**
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+	- Act as a **buffer**
+- Major functions of protein in the body:
+	- To build new cells and many parts of cells
+	- As a component in hardened structures like hair and nails
+	- As enzymes to speed chemical reactions
+	- As lubricants to ease movement
+	- In clotting compounds in blood
+	- To build antibodies that fight disease organisms
+	- As compounds that help maintain fluid and pH balance
+	- As transporters
+	- To make certain hormones
+	- As an energy source (as a last resort)
+- 
+# Introduction
+- By helping to maintain fluid balance, proteins prevent **edema** (accumulation of fluid in tissues
+- Proteins also help maintain **acid-base balance**.
+	- Maintaining the proper pH of body fluids
+	- Acts as a buffer
+
+# Amino acids
+- Amino acids are nitrogen containing chemical units that comprise proteins
+- There are 20 different amino acids found in the proteins of the human body
+- Each amino acid has a carbon atom that anchors
+	- Hydrogen atom
+	- Amino or nitrogen containing group
+	- R group (side chain)
+	- carboxylic acid group
+- nonessential amino acids are a group of amino acids that the body can make
+- Essential amino acids are amino acids the body cannot make or cannot make enough of to meet its needs
+- Conditionally essential amino acids are the amino acids the body cannot make or cannot make enough of to meet its needs
+- There are 9 essential acids and 11 non-essential acids
+| Essential | Non
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