An example of your body's so-called first line of defense against infections would be

Although you may not think about it, anything you see on a person serves as a first line of defense.

The skin is almost always the first line of defense. Pathogens have a hard time going through skin, being on big shield. Also skin secrets enzymes and oils that destroy bacteria.

The orifices of the face particularly the nose and mouth use saliva and mucous to trap pathogen. Cilia further down pushes particles upward.

The cerumen ofbthe ear trap pathogens and particles really well.

The scientific method is a series of steps followed by scientific investigators to answer specific questions about the natural world. it involves making observations, formulating a hypothesis, and conducting scientific experiments.the steps of the scientific method are •observation-the first step of the scientific method involves making an observation about something that interests you•question-once you've made your observation, you must formulate a question about what you have observed. •hypothesis-once you've made your observation, you must formulate a question about what you have observed. •experiment-once you've developed a hypothesis, you must design and conduct an experiment that will test it.•results-the results are where you report what happened in the experiment. •conclusion-the final step of the scientific method is developing a conclusion.i hope that this you : )

Um can u take a picture of the work