You should know these in Grade School;
functions of the human body.

The first organ to receive oxygen-rich blood is the heart.

It will start to beat during the fourth week of a mother’s pregnancy. The more active you are, the more energy your body needs, so your heartbeat automatically changes to match your current phase.

Scientists are still studying why and how we are dreaming, they are even looking on how we can keep and store our dreams. Some says that the higher the IQ a person has, tends the person to dream more. They believe that half of the brain’s power is devoted to processing our vision.


Left Brain: (also called ‘Left hemisphere’).

  • Takes charge of the daily routine; such us taking a bath, combing hair, brushing the teeth, eating, drinking,and many more. These are the things that we do every day without much concentration or thinking.
  • Language (verbal or written skills) are being controlled by the left brain.
  • Calculation and thinking logically; these gives us the ability to analyse a problem and work out with the answer.

Right Brain: (also called as ‘right hemisphere’).

  • Our voice is being processed by the right brain; the tone, rhythm and accent of speech, although the left brain deals with words.
  • Recognizing objects, the right brain easily identifies that specific
    object if it is an apple or a pear.
  • Is responsible for visualizing objects in 3D. It has the ability to think
    what it looks like if the object is upside down, it is under spatial skills.

Do you know that our tongue is the strongest muscle in our body? It is a long, soft, pink fleshy muscular organ which moves inside our mouth that helps you talk and taste food.

  • We can only taste something if our saliva can dissolve it. To test this, dry your tongue before putting something on it. 
  • Tongue has also unique prints in every human, just like fingerprints. It has 14 muscles which is why it is so flexible.
  • More muscles are being used to frown than we use to smile; it will take around 40 grumpy muscles to 12 happy ones.

Sperm and egg only contains half of the DNA that is required to create a human being.

  • Female egg or ‘Ova’ is the largest cell in the human body. It is 0.0004 in (0.1 mm) and it is visible without a microscope.
  • Human begins life in a single cell, which divide (called ‘mitosis’) and becomes trillions of cells that make up the human body.

The scrotum – which holds sperm – sits outside a man’s body. This is because internal body temperature would kill the sperm.

Cells that has the shortest lifespan are those lining the small intestine. They can only live for about 36 hours. However brain cells may last in a lifetime.

Our body is made up of 100 trillion cells and every second, our body is producing 5 million new cells to replace those that die.

  • It takes about a minute for a single red blood cell to travel around our entire body. These small, dimpled blood cells carry oxygen from the lungs to body tissues.
  • Our red bone marrow makes red blood cells of about 2 million cells every second.

The type of hair you have depends on the shape of your scalp hairs. The follicle of straight hair are round; those oval are for wavy and flat hair shafts will have curly hair. Shape of the hair will depends if it is round, oval or flat follicle.


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