Is there a reason why hair grows in the human body?

(is it phosphorous excretion mechanism)? If so, why cant I use my hair like a match to strike a fire? Why do all human beings do not grow same length hair in the same body regions? Some have short hair some have long hair distributed in different areas of human body? Is it there to create air traction (landing points) for "nothing but air"?

What are the two areas in the human body where the 2 systems are connected and how?

What are the two areas in the human body where the 2 systems (circulatory, respiratory and digestive systems) are connected, what are the two systems and how?
I think it is the lungs and villus but I'm not sure.

How do the human body systems work together?

i have a stupid extra science project for my class, that the other teachers class doesent have and I need o make nine text boxes about how the human body systems work together. like the muscular, skeletal, skin, digestive, and respiratory are the systems i have on my poster. can any body give me some links maybe to a page to find some stuff, because i suck at researching stuff and i can't find anything!!!! HELP! p.s. this thing is due tomorow!

How do tissues and organs work together in a human body?

Please describe how tissues and organs work in the human body.

How much intensity of magnetic field can be safely withstand by the human body ?

This is related to exposure of human body to high intensity magnetic fields. I want to know what is considered the safe limit of intensity of magnetic field for the human body, as per the existing knowledge.

What elements from the Periodic Table of Elements is the human body made up of?

With regards to the infamous Periodic Table of Elements (that we all know from high school chemistry class) - what type of molecules and atoms is the human body made up of?

I know our bodies are mainly composed of water, so that would by Hydrogen and Oxygen molecules. But what else?

Any helpful books on the human body that would spark interest in becoming a doctor?

My eleven-year old daughter really wants to become a doctor, but does not know where to start. Do you have any experience with books that start kids getting interesting the human body/brain especially? Please send in any information you have!

At what rate is the human body radiating energy when it is at 33 degrees C? Take the body surface area to be 1?

At what rate is the human body radiating energy when it is at 33 degrees C? Take the body surface area to be 1.4 m^2, and approximate the body as a blackbody.

How long can a human body survive without pooping?

I just got out of a hospital today and I couldn't go poop because I thought it was the medicine keeping me from going poop.
I used the bathroom 2 times at home today and I was off medicine and
im worried.
It been 4 days since I couldn't go poop.
How long can a human body survive without pooping?

How to get friend over her hatred of the human body?

My friend Johanna hates the human body. I tell her she has a beautiful body but she ignores my compliments. What should/can I do to get her over her hatred of the human body?
Virgoprincess: Nope. She does not hate her body. She hates the human body. She thinks it is disgusting.