The common wants of most of the human beings are:
- We all want to eat tasty food
- We all want to remain fit
To make tasty food, knowing the ingredients and process of making of the food is not only important but is a basic necessity.
To make our body Fit, isn’t it necessary to know the basic components of the body and the process of making the components perform its best to keep us fit?
The differences between the two common wants stated above are;
- Someone can know the recipe and make tasty food for us
- Someone cannot give us fitness, we ourselves have to attain the fitness
& therefore knowing the composition of our body, working of different body parts and system to keep them fit is all the more important than knowing the recipe of any dish of our choice.
The human body is made up of cells. In the mother’s womb, sperm and eggs combine to make a single cell. Then in the womb cell multiplies. Soon there are hundreds of different cells and they then make 50000 (Yes, Fifty thousand) different protein to control the work of all our cells. Some of these proteins are, collagen, which builds skin, insulin controls energy use, and hemoglobin supply oxygen.
Finally, in nine months, some 25 trillion living cells will emerge!! The human body is made of such trillions of cells.
These cells provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions. Cells also contain the body’s hereditary material and can make copies of themselves. Therefore, each cell must be able to exclude, take in, and excrete various substances, all in specific amounts. In addition, they must be able to communicate with other cells, identifying themselves and sharing information.
Each cell has a nucleus which controls the cell and cell membrane which is the outer coating of the cell.
Therefore, when the human body is made of cells, knowing what are the major components of these cells are extremely important when we are discussing about the fitness of the body.
Each cell is made up of;
- Water – 60%
- Organic Molecules – i.e. Carbohydrate (5%), lipids (Fat) (17%), protein (17%) and nucleic acid (DNA & RNA)
- Inorganic ions – 1%, i.e. Sodium, potassium, magnesium, calcium, phosphate, chloride, and bicarbonate
The single cells, many of which are specialised so that they can perform a particular function, are grouped together to form tissues. These tissues in turn form special groups called organs. The groups of organs make up a system, and the systems join together to form a living body.
Water + Organic Molecules + Inorganic Ions = Cell (Like white blood cell, red blood cell etc.)
Many Cells = Tissue (Like muscle tissues, connective tissues, nervous tissues etc.)
Many Tissues = Organ (Like lungs, heart, intestine etc.)
Many Organs = System (Like respiratory system, cardiovascular system etc.)
Many Systems = Body (Like human, cat, dog, monkey etc.)
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