Skeletons & Amazing Facts

8/2/2019 Skeletons & Amazing Facts

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Exo- means outer, and Endo- means inner. So an exoskeleton means that the"framework" of the creature is on the outside, like the lobster. An endoskeleton isinside the creature, so the soft parts are outside, like the bear or man.

Endo means "inside", exo means "outside", and a skeleton is a structure thatprovides a rigid structure for the body.

So, humans have endoskeletons (our rigid bones are inside our body), while crabsand lobsters have exoskeletons (their rigid shells are outside their body). It's simplya matter of where your support structure is - inside (end) or outside (exo).

Human Skeleton

The human skeleton consists of 206 bones. We

are actually born with more bones (about 300),

but many fuse together as a child grows up.

These bones support your body and allow you to

move. Bones contain a lot ofcalcium (an

element found in milk, broccoli, and other

foods). Bones manufacture blood cells and store

important minerals.

The longest bone in our bodies is the femur

(thigh bone). The smallest bone is the stirrup

bone inside the ear. Each hand has 26 bones in

it. Your nose and ears are not made of bone;

they are made of cartilage, a flexible substance

that is not as hard as bone.

Differences in males and females: Males and

females have slightly different skeletons,including a different elbow angle. Males have

slightly thicker and longer legs and arms;

females have a wider pelvis and a larger space within the pelvis, through which babies travel

when they are born.


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THE NEW SEVEN WONDERS OF THE WORLD

The Great Wall of China

This 4,160-mile wall was built to protect China from invading Huns,

Mongols, and other tribes, and to unite fortifications into one defense

system. Begun in the 7th century B.C., the barricade took hundreds of

years to build, and ranks as the world's longest man-made structure-

and is apparently the only one visible from space.

Petra

Jordan

This ancient capital city was built around 9 B.C. during the reign of

King Aretas IV and continued to flourish during the Roman Empire. It

is now visible in its pink stone ruins and carved faade.

Christ Redeemer Statue

Brazil

Standing 125 feet tall atop the Corcovado Mountain high above Rio,this statue took five years to build. Constructed in France by sculptor

Paul Landowski, it was shipped to Brazil in pieces, and then carried up

the mountain by train, where it was reassembled.

Machu Picchu

Peru

This "city in the clouds" was built 8,000 feet above sea level in the

15th century by Incan emperor Pachacutec. Abandoned by the Incas,

the city remained unknown until it was rediscovered by an explorer in

1911.


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Pyramid at Chichen Itza

Mexico

The center of Mayan civilization in its day, Chichen Itza is still visible

in several structures, including the pyramid of Kukulkan.

Roman Colosseum

Italy

This giant, 50,000 seat amphitheater in the center of Rome was built

over 2,000 years ago, and still influences the design of sports

stadiums worldwide.

Taj MahalIndia

Built in 1630 by a grieving emperor, Shah Jahan, in honor of his dead

wife, this white marble structure combines Indian, Persian, and

Islamic style of architecture.

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Skeletons & Amazing Facts