white blood cells easy as pie
I think the first body part to cross the line stops the time.
Well actually, not a body part but the White Blood Cells in the body ingest microbes by the process called phagocytosis. More info: http://en.wikipedia.org/wiki/Phagocytosis Also, lysosome which is found inside a cell has the ability to ingest microbes.
Cartilage is the part of the skeleton that never stops growing.
Microbes might be either useful or harmful. Those that cause disease are of course, harmful, but there are millions of microbes in your body that aid in functions such as digestion. There are also microbes that occur in food products. Yeast is a good example. Also yogurt contains microbes as part of the product.
There is no such organ in human body.
The air passage
it would die...the shell is part of its body...it is like our ribs...stops stuff from getting to our organs
Yes, it is. Microbes can get in through any hole in your body, and your ear holes are one of them. The ear wax is a sticky substance that stops microbes from infecting your ears and letting your body get infected by microbes. Further answer I personally don't see it as part of the immune system. Defence system - yes, immune - no. The immune system fights bacteria and other foreign bodies by developing anti-bodies which kill them, generally in the blood stream. Not quite the same thing as stopping stuff getting into your ear in the first place.
its their teeth!
Complement is a part of the immune system that can kill foreign microbes by either directly lysing them through the formation of a membrane attack complex or by marking them for phagocytosis by immune cells. It can also enhance the inflammatory response against the microbes, aiding in their clearance from the body.
Yes of course, we feed on plants and animals both and our body is also subjected to feed several carnivores and microbes.
beak