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Short Answer:
By weight, oxygen makes up approximately 65% of the human body.
Numerically, hydrogen approaches 65% of the total number of atoms in the human body, but it is probably closer to 63% for most people.
The compound that contributes most to the eight of a human is water which averages around 60% of the weight of an adult.
Accounting by Mass:
The mass of the human body is provided mostly by oxygen, carbon, hydrogen, nitrogen. Together these elements account for about 96% of the mass of a human.
Add in about a kilogram of calcium in the bones and body fluids and you are up to 97.4%. All of this depends on the particular person since water, our major component, can differ by 10% from one individual to another.
That said, typically the breakdown goes like this.
Oxygen: 65% of the mass
Carbon: 18% of the mass
Hydrogen: 10% of the mass
Nitrogen: 3% of the mass
Calcium: 1.4 % of the mass
Phosphorus 1.1% of the mass
With phosphorus, one has accounted for 98.5% of the mass of the typical human and that will change by a couple of tenths from person to person.
Accounting by Numbers:
Numerically we have nearly twice as many hydrogen atoms in our bodies as compared to all other elements combined. Specifically, hydrogen counts as 63% of our atoms by number, give or take a bit, but being so light it barely gets to 10% of our mass. Oxygen atoms count as 24% and carbon atoms are a mere 12% of the populations. Together, our three basic organic building blocks account for 99% of all the atoms in the body.
Caveat:
As was said above, the water content of the human body weight varieties between 55 to 65 % from one person to the next and being the major component changes the numbers above a little for each individual.
Summary:
Almost 99% of the mass of the human body is made up of the six elements oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus.
Most of the last 1% is made up of five elements: potassium, sulfur, sodium, chlorine, and magnesium, but a tenth of a percent or so is made up of another dozen or so elements which include those recognized as essential to health such as iron, iodine and fluorine as well as beneficial trace elements like manganese, copper and zinc.
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Fifty percent of your body weight is made up what nutrients?
Over half the body is made up of water (H2O).
How much of a woman's body is made of water?
About 55 percent of an adult human female's total body weight is water
What percent of a child's body is made of water?
Basic Answer:At birth, a baby can have up to 75% water weight and this decreases with age.More:The human body has a variable water content that changes daily and with age and gender and body type.On average, adult humans have 57 to 60 % water by mass.At birth, a baby can have up to 75% water weight and this decreases with age.Obese individuals can have as little as 45% water weight.Women tend to have a few percent less water weight than men, but this is largely a difference in muscle and fat between individuals.
How does thirst response helps humans maintain homeostasis?
it gives you water because your body is made up of at least 60% of water
Why can't human beings live without water?
Humans need water to survive because it provides hydration to the body and organs.
Are humans made of water?
Mostly...The human body is 61.8 percent water by weight.
What percent of a human weight is made of water?
Almost 60 % of body weight is composed of water. 40 % of the body water is in the intracellular compartment and 20 % of the body water is there in extracellular compartment.
What is human body mostly made of?
The human body is mostly water by weight.
What is the human body mostly made of?
The human body is mostly water by weight.
The Gulf Of Mexico is made by humans or the earth?
It is a natural (earth made) body of water.
What percentage of a dogs body is made of water?
60% of a dog weight is water.
Fifty percent of your body weight is made up what nutrients?
Over half the body is made up of water (H2O).
About how much of a human body weight is made up of water?
70%
Which compound is more than 70 percent of the body's tissue?
70% of a humans body is made of water.
How much of a woman's body is made of water?
About 55 percent of an adult human female's total body weight is water
How much of a man's body is made of water?
About 60 percent of an adult human male's total body weight is water
How much do humans drink when they are thirsty?
it's because more than 50% of your body is made of water. it's because more than 50% of your body is made of water. it's because more than 50% of your body is made of water.
