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How come your joints crack without your bones breaking?

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If you're in the market for a short answer, it takes about 4,000 newtons of force to break the typical human femur. But in general terms, there is no real answer, as the amount of force required depends on the bone itself, its position in the body, and the angle of attack.

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If a bone bends too much it will eventually break.

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The adult body has 206 bones in total

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Can bones be complete dry without breaking?

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How do broken bones recover?

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What happens after a bone breaks?

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Can a bone ever shrink?

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Can a bone bend?

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How  much kinetic energy is needed to break a bone of a person?

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The inside of the bone is a squishy, spongy material called bone marrow.

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CO2 is a waste product.

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Cellular respiration is a set of metabolic reactions and processes that take place in the cells of organisms to convert biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products.

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The alveoli does the trading between O2 and CO

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Smoke you breathe from cigarettes is more deadly than the smoke you breath in from fire

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Is breathing in smoke from a fir different from breathing smoke from a cigarette?

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The respiratory system consists of all the organs involved in breathing. These include the nose, pharynx, larynx, trachea, bronchi and lungs.

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How many organs are in the respiratory system?

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Yes with the circulatory system

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Blood has plasma , red blood cells, white blood cells, and platelets

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Cellular respiration is a chemical process that allows cells to grow, reproduce and deposit waste.

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If you stretched your veins and arteries out into a straight line it be able to go around the Earth 2 and 1/2 times!

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How many arteries do you have?

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How many veins do you have?

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Drooling or sialorrhea can occur during sleep. It is often the result of open-mouth posture from CNS depressants intake or sleeping on one's side. Sometimes while sleeping, saliva does not build up at the back of the throat and does not trigger the normal swallow reflex, leading to the condition.

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There are 9 organs on the digestive tract.

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Once grown to full size, the stomach never gets smaller unless you have surgery to intentionally shrink it.

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Why do some people drool when they sleep?

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Is there some type of sickness that can stop the stomach from producing the mucus it uses to protect itself?

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Does the stomach get smaller?

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How does your mouth produce saliva?

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It takes about 2-6 hours to digest, and you don't lose cells, you lose food molecules.

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If you eat something sharp like a broken chip, does it scratch your esophagus going down to your stomach?

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The stomach growls, because it is the movement of food, liquids and air moving though your small intestines.

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Why does the stomach growl sometimes?

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Why when I eat beans I fart?

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Can you digest everything you eat?

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The human respiratory system is a series of organs responsible for taking in oxygen and expelling carbon dioxide. The primary organs of the respiratory system are lungs, which carry out this exchange of gases as we breathe.

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How long does it take to digest your food? Do you lose cell when you digest food?

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How many organs are in the digestive system?

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Does the digestive system work together with other systems?

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Is it true that using a T.V can kill brain cells

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The digestive system consists of the small and large intestines, gall bladder, liver, etc.

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Do we have dead brain cells?

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What happen to cells that die?

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How many cells does a body have?

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What does the digestive system consist of

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an internal or external framework of bone, cartilage, or other rigid material supporting or containing the body of an animal or plant

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Some examples of single celled organisms include amoebas, bacteria, algae, and plankton.

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2/3 of cells are water which is mixed with proteins and lipids and carbohydrates

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*Cells are the smallest units of life
*Cell make up parts of the body
*Cells have boundaries
*Cells have different shapes

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The one who discovered cells was Robert Hooke.

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Plant cells have chloroplasts which they use in photosynthesis, while animal cells don't have them since they don't have photosynthesis.

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Your brain sends messages through your spinal cord and the peripheral nervous system to: control the movement of your arms and legs. control the automatic functions of your body, such as the operations of your heart, your organs and your glands.

Credit: Google

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Does your nervous stretch over all of your body?