The complement system is a barrier of the immune system. the complement system is a group of in the blood that detect pathogens that have entered the body. the complement system can cause , the swelling of a part of the body accompanied by redness, swelling, and pain as a response to infection.

"The complement system is a biological barrier of the immune system. The complement system is a group of proteins in the blood that detect pathogens that have entered the body. The complement system can cause inflammation , the swelling of a part of the body accompanied by redness, swelling, and the pain as a response to infection. 5.0."

the electromagnetic energy from the sun arrives in the form of visible and invisible light.

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products