22-02-2013, 10:54 AM
BIOMECHANICS
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What is biomechanics ?
Biomechanics is the study of the structure and function of biological systems such as humans, animals, plants, organs, and cells by means of the methods of mechanics.
HUMAN EYES
The rod cells give you black-and-white vision, and your night vision. Your colour vision comes from about 6 to 7 million cones inside your eye
cones are packed together in a tiny area called the fovea
The rods are spread out over the back of the eyeball in a larger area called the retina.
HUMAN BONES
Bones are amazing. From the bones in your feet to the bones in your skull, your body has 206 kinds of different bones. These bones give your body its shape.
Bones are surprisingly strong. They get this strength from calcium
If you think about how hard and strong cement is, you have an idea of how bone can be so strong.
Cement, like bone, contains a lot of calcium. But how is the calcium turned into bone? There are cells called osteoblasts that do the work.
Heart and Blood
Along the way, many different things happen.
Probably the most important thing is that the red blood cells release their oxygen to your body’s cells and then they pick up carbon dioxide released by the cells.
Miles and miles of tiny blood vessels called capillaries take the blood close to every cell in your bod
Blood
Blood by the Numbers
· Amount of blood: 7 to 8 liters
· Number of red blood cells: 25 trillion
· Forty percent of blood (by volume) is red cells
· Number of platelets: 2 trillion
· Number of white blood cells: 40 billion
MOLECULAR BIOMECHANICS
in living cells. n particular, single-molecule biomechanics studies of proteins and DNA, and mechanochemical coupling in biomolecular motors have demonstrated the critical importance of molecular mechanics as a new frontier in bioengineering and life sciences
Molecular motor
Molecular motors are biological molecular machines that are the essential agents of movement in living organisms.
In general terms, a motor may be defined as a device that consumes energy in one form and converts it into motion or mechanical work
for example, many protein-based molecular motors harness the chemical free energy released by the hydrolysis of ATP in order to perform mechanical work.