Staphylococcus aureus, or staph, is a bacteria that is commonly found in the nose and on the skin of humans. while it is typically not harmful to humans, it is sometimes able to enter the body through an injury or broken skin, and get into the bloodstream. when this happens, it can cause a serious infection called sepsis. sepsis can cause an individual to go into shock and bodily organs to stop functioning. symptoms of sepsis include inflammation, fever or hypothermia, increased heart rate, and rapid breathing. which immune system component initially results in the infammation and responds quickly when staphylococcus aureus enters the bloodstream? complement system phagocytes langerhans cells b lymphocytes

Phagocytes, like neutrophils, are typically the first responders & most abundant in the bloodstream during acute (usually short-term) infections. They stimulate the inflammatory response.

Thr other options are more for specific immunity that take longer to work.

Fungi is were it belongs

Proteins are the workhorses of the cell, controlling virtually every reaction within as well as providing structure and serving as signals to other cells. proteins are long chains of  amino acids  , and the exact sequence of the amino acids determines the final structure and function of the protein. instructions for that sequence are encoded in  genes  . to make a particular protein, a messenger ribonucleic acid (mrna) copy is made from the gene (in the process called  transcription  ), and the mrna is transported to the  ribosome  . protein synthesis, also called  translation  , begins when the two ribosomal subunits link onto the mrna. this step, called initiation, is followed by elongation, in which successive amino acids are added to the growing chain, brought in by transfer rnas (trnas). in this step, the ribosome reads the  nucleotides  of mrna three by three, in units called  codons  , and matches each to three nucleotides on the trna, called the anticodon. finally, during termination, the ribosome unbinds from the mrna, and the  amino acid  chain goes on to be processed and folded to make the final, functional protein