Skip to main content

More for You

How does Messi keep the ball close to himself

Your friend
The science of how Messi keeps the ball close to himself photo credit: ZaleDesigns Messi is a magician with the ball at his feet. He's in my opinion the best player in the sense that he can control the ball so well, runs so fast with the ball & changes the direction at full speed like it's a walk in the park. For starters he started playing very early (at 3) which is crucial if you want to be a good player. In that aspect, he's God gifted as he had dribble skills which is genetic in my opinion. Height He is short which means a low center of gravity so it's difficult to push him off the ball. That's why we see that anyone rarely can topple him down, instead players much larger than him lose possession to him. So his short height suits his style of play & is a blessing in disguise. Change of pace Messi changes his pace really well. He starts slow and runs directly at the defender which means the defender has to stop & focus on him. When he reac...
1 comment

what is respiration?

Image
Your friend

Biology - Respiration

Introduction

  • The food material, taken in during the process of nutrition, is used by cells and then they provide energy for various life processes.

  • Some organisms use oxygen to break-down glucose completely into carbon dioxide and water, such processes normally take place in cytoplasm.

  • The following diagram illustrates the whole process of break-down of glucose through various pathways −


  • During cellular respiration, the energy released, is immediately used to synthesize a molecule known as ATP.

  • ATP is further used to fuel all other activities in the cell. However, in these processes, ATP is broken down and give rise to a fixed amount of energy. This energy usually drives the endothermic reactions taking place in the cell.

  • Adenosine triphosphate or simply ATP is a small molecule used in cells as a coenzyme (see image given below).

  • More often, ATP is referred as the energy currency for most of the cellular processes (especially intracellular energy transfer).


  • Likewise, ATP transports chemical energy within cells for metabolism purpose.

  • In plants, at night, when the process of photosynthesis is not taking place, for such a period, CO2 elimination is the major exchange activity.

  • On the other hand, during the day, the CO2, which is getting generated during respiration, is used up for the photosynthesis process, hence there is no CO2 release. But, at this time, oxygen release is the major event.

  • The terrestrial animals can breathe the oxygen free available in the atmosphere, but animals that live in water have to use the oxygen dissolved in water.

  • The rate of breathing in aquatic organisms is much faster than that of terrestrial organisms, because the amount of dissolved oxygen (in water) is fairly low in comparison to the amount of oxygen present in the air.

Respiration in Human

repiration in humans


  • In human beings, air is inhale into the body through the nostrils.

  • Through the nostrils, the air passes through the throat and into the lungs.

  • Further, there are Rings of cartilage, present in the throat; these rings ensure that the air-passage does not collapse (see the image given below).


  • Within the lungs, the passage gets divided into smaller and smaller tubes (see the image above), which finally terminate in balloon-like structures known as alveoli.

  • The alveoli provide a base or surface where the exchange of gases can take place.

  • The walls of the alveoli comprise an extensive network of blood-vessels. So, while breathing in, we lift our ribs and flatten our diaphragm; as result of this, the chest cavity becomes larger. During the process, air is sucked into the lungs and fills the expanded alveoli.

  • The blood, on the other hand, brings carbon dioxide from the rest of the body for release into the alveoli, and the oxygen in the alveolar air is taken up by blood in the alveolar blood vessels for further transportation to all the cells in the body.

  • Remember, during the breathing cycle, when we take air in and let it out, the lungs always store a residual volume of air so that there is sufficient time for the oxygen to be absorbed and for the carbon dioxide to be released.

  • In human bodies, the respiratory pigment is haemoglobin; and the haemoglobin has a high affinity for oxygen.

  • The haemoglobin is present in the red blood corpuscles.

  • In comparison to oxygen, carbon dioxide is more soluble in water and hence it is mostly transported in the dissolved form in blood.

Labels:

Comments

Post a Comment

RECENTS

The Fundamental Units Of. Life

Your friend
Biology - The Fundamental Unit of Life Introduction The fundamental unit of life is cell. Cell was first discovered by Robert Hooke in 1665 in a simple microscope. In 1674, Leeuwenhoek, with the help of developed microscope, discovered the free living cells in pond water. In 1831, Robert Brown had discovered the  nucleus  in the cell. In 1839, Purkinje used the term ‘protoplasm’ for the fluid substance found in the cell. The cell theory was proposed by Schleiden (1838) and Schwann (1839). According to the cell theory, all the plants and animals are composed of cells and that the cell is the basic unit of life. In 1855, Virchow further expanded the cell theory and suggested that all cells arise from pre-existing cells. In 1940, the discovery of electron microscope made possible to observe and understand the complex structure of the cell. Unicellular Organisms The single cellular organisms, such as  Amoeba, Chlamydomonas, Paramoecium , and bacteria, ...
Post a Comment
continue reading »

carbon and it's compound

Your friend
Chemistry - Carbon and its Compounds Introduction Carbon plays very important roles for all living beings. The amount of carbon in the earth’s crust is merely 0.02%, which is available in the form of minerals such as carbonates, hydrogen-carbonates, coal, and petroleum. The presence of carbon in the atmosphere of the earth is 0.03%, in the form of carbon dioxide. Compounds of Carbon Almost all carbon compounds (except a few) are poor conductors of the electricity. The diamond and graphite both are formed by carbon atoms; however, the difference lies between them in the manner in which the carbon atoms are bonded to one another. In diamond, each atom of the carbon, is bonded to four other carbon atoms and form a rigid three-dimensional structure (see the image given below). In graphite, each atom of the carbon, is bonded to three other carbon atoms in the same plane, which gives a hexagonal array (see the image given below) − There is also difference in some physical structu...
Post a Comment
continue reading »

What happened to the dinosaurs?

Your friend
WHAT REALLY HAPPENED TO THE DINOSAURS One day 66 million years ago, an asteroid the size of a mountain struck near the Yucatán Peninsula with an explosive force equivalent to 100 trillion tons of TNT. In that cataclysmic instant, the 165-million-year reign of the dinosaurs came to an end. The asteroid theory of the dinosaurs’ demise was first suggested in 1980. More than a decade later, the identification of the Chicxulub Crater in the Gulf of Mexico established where and when. Using an impact calculator developed by geophysicists from Purdue University and Imperial College London, researchers obtained a pretty good idea of what occurred at the moment of impact and immediately after—what is known as the K-Pg (Cretaceous-Paleogene) extinction event. The asteroid struck the Earth at 40,000 miles (64,000 kilometres) per hour, creating a crater more than 115 miles across and instantly vaporizing thousands of cubic miles of rock. Any creature close enough to witness the strike was immediate...
Post a Comment
continue reading »