It must be noted, however, that not all women experience bright red period blood. In fact, menstruation blood can be of numerous shades, including dark red, brown or black, orange and pale red or pink. Every shade has its own causes and some may be quite normal to experience whilst others may need medical treatment.
Proteins make up about 15% of our body mass. They are the most abundant 'solid' substances in our bodies. Each protein has its own precise function under the direction of its own gene. The shapes of proteins are of key importance. These are determined by the sequence of amino acids that make them up. Amino acids are the building blocks (monomers) of proteins. Twenty different amino acids are used to make the body's proteins.
Proteins are very important molecules in our cells. They are involved in virtually all cell functions. Each protein within the body has a specific function. Some proteins are involved in structural support, while others are involved in bodily movement, or in defense against germs. Proteins vary in structure as well as function.