fascinating facts about human & animals

7/31/2019 Fascinating Facts About Human & Animals

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Fascinating facts aboutHuman & Animals

Prepared by:

Himanshi Tobaria

Class X F

Roll No 12


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Fact # 1

Unlike other body cells,brain cells can not

regenerate. Once braincells are damaged theyare

not replaced.


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Fact # 2

The surface area ofthe lungs is roughly the

same size as a tenniscourt.


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Fact # 3

About 2 million bloodcells die in the human

body every second, andthe same number areborn each second.


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The longest muscle inthe body is the

sartorius, from the

outside of the hip,down and acrossto the inside of theknee. It rotates thethigh outwards and

bends the knee.

Fact # 4


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Fact # 5

The smallest bone isthe 'stirrup (stapes)',

deep in the ear. It ishardly larger than agrain of rice.


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After death, cartilagerots faster than bone.This is why the skulls

of skeletons have nonose or ears.

Fact # 6


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Fact # 7

It takes about 1 minutefor a red blood cell to

circle the whole body.


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Tears and mucuscontain an enzyme

(lysozyme) that breaks

down the cell wall ofmany bacteria.

Fact # 8


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Fact # 9

The capillaries in thelungs would extend

1,600 kilometers ifplaced end to end.


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Fact # 11

Everything about asloth is slow-moving,

including his digestivesystem. It can take upto a month for a slothto process his food.


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No other species have

such wide variety ofbones than dogs. Eventhough a Chihuahua will

be having the samenumber of bones asthat of a Great Dane

but the shape and sizeof the bones will bevarying to a great

extent.

Fact # 12


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Fact # 13

A cow's stomach isdivided into four sections.The first section softens

the cow's food, the

second section sends thefood back up to the mouthwhere it can be rechewed,the third section removes

the moisture from foodand the last section mixesthe food with digestive

juices.


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Blue whales have largeenough aortas (the

main blood vessel) for ahuman to crawlthrough.

Fact # 14


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Fact # 15

A garden caterpillarhas 248 muscles in its

head.


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Snakes have no armsor legs, but they can

have up to fivehundred vertebrae intheir flexible spine.

Fact # 16


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Fact # 17

Scientists estimatethat a normal horse will

produce about 10gallons of saliva daily.


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A bird's crop acts as astorage compartmentfor excess food that a

bird can't eat at onesitting. Its two-chambered stomach

mixes the food withdigestive acids andcrushes the food

thoroughly.

Fact # 18


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Fact # 19

The flea can jump up to200 times its own

height. This isequivalent to a manjumping the EmpireState Building in New

York.


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The plethodontids, alsocalled "lungless

salamanders" mustabsorb oxygen throughtheir skin and mouth tobreath since they lack

lungs.

Fact # 20


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http://www.bodyworlds.com/Downloads/did_you_know.pdf

http://www.ehow.com/facts_5526620_animals-digestive-system.html

http://www.oum.ox.ac.uk/educate/resource/aniskel.pdf

http://www.thefactsite.com/2010/09/300-random-animal-facts.html

http://animals.about.com/od/amphibians/a/amphibian-facts.htm

http://www.ker.com/library/EquineReview/2005/HorseWorld/HW27.pdf

References


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