Fact About Liver!!!

Liver is one of the vital organs in our body.Here I am sharing with you one of very interesting fact about liver, which I came to know very recently.

We have come across Lizards. If you ever cut the tail of a lizard it will grow back automatically.

Liver is one such organ which can grow back. Perhaps Liver is the only organ which can grow back in our body.

The liver is the only organ which can be partially removed from our body and can still function effectively in a human body. Over a certain period of time,Liver grow back eventually.Liver has the potential to regenerate automatically.

We can even cut ones liver partially and donate it to one of our close relatives. But the transplantation can be carried out within close relatives because while transplanting the tissues of both the persons should match. Removing a partial liver is a major surgery and not an easy one.

However the rate in which our liver grows back depends on prostaglandins. prostaglandins is a member of lipid compounds.

Picture courtesy:www.hepfoundation.org.nz

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Why people feel sleepy when they read?

Have you ever wondered why we feel sleepy when we read for a long time?

I found the answer when I was going through some of the Scientific facts in internet.

We usually feel sleepy when we study or read for a longer time. We conclude that we feel sleepy as the subject we are reading is boring or uninteresting.

But the actual reason is not that. We feel sleepy due to the posture in which we study. When we are studying for a long time continuously, lack of physical activity decreases our blood flow to muscles.

Due to this lactic acid accumulation takes place. Lactic acid is formed due to incomplete combustion in cells. Lactic acid is an agent which absorbs oxygen and it readily reacts with oxygenated blood thus reducing the flow of oxygenated blood to the brain.

Yawning also occurs due to reduction in the amount of oxygen in blood. So the amount of oxygenated blood to brain reduces and makes us feel sleepy.

To avoid this we have to take occasional breaks while studying,which involves some physical activity.