© Copyright NewPath Learning. All Rights Reserved. 94-4933Visit www.newpathlearning.com for Online Learning Resources.The Skeletal SystemFunctions of the Skeletal SystemYour body has a total of 206 bones, which are attached to your muscles with tendons. The bones of your body have several important functions. They provide support for your body position and movement so you can walk upright. Bones protect vital organs such as your brain and your heart. Bones also help manage and store minerals and even create new blood cells.axialskullspineribssternum80 bonesappendicularshoulderhiplimbs126 bonesredmarrowcalcifiedmatrixcompactbonesecondarycalcificationcenterartery(supplies nutrients)spongybonecartilagecompactbonespongy bonebone marrowThe Appendicular SkeletonThe highly movable, regions of your body are called your appendicular skeleton. This includes your shoulders and hips and the limbs attached to them. The 126 bones in this part of your skeleton help you turn and twist in many directions and support a wide range of movement for your arms and legs. Bone StructureBone is a very dynamic tissue with two key properties that combine to provide strength and support to your body. The outer, smooth part of bone is made up of compact bone. It looks hard to the naked eye and is densely packed tissue. The inner structure of bone is called spongy bone. This bone tissue provides great strength, especially at the ends of bones, because of its honeycomb type structure. Bone FormationMost bones in the body begin as cartilage molds that grow and are slowly replaced by bone tissue rich in calcium that makes the tissue stronger and more rigid. Growth and shaping of bone structure continues throughout our entire life under the effects of gravity and other physical forces. The Axial Skeleton The includes the skull, spine, ribs and sternum, which total 80 bones. These bones anchor the body and have . For example, the only skull bone which can move freely is your jaw bone. jawYour body has a total of 206 bones, which are attached to your muscles with tendons. Thhhhhhhhhhhhhhhheeeeeeeeeeeeee bbbbbbbbbbbbbbbbooooooooooones of yourrrrr bbbbbbbbbbbbbbbbbbbbooooooooooooooddddddddddddyyyyyyyyy havvvvvvvvvvvvveeeeeeeeeeeeeee ssssssssssssssseveeeeeerrrrrrrrrrrrrraaaaaaaaaalllllllllllll important functions. They provide support for your body position and movement so yyyyyyyyyyyyyyyyoooooooooooouuu cccccccccccaaaaaaaaaaannnnnnnnnnnn walk upright. Bonessssssss pppppppppppprrrrrrrrrrrrotect vital organs such as your brain and your heart. Bones also help manage and store miiiiiiiiinnnnnnnnnnnnnnneeeeeeerrrrrrrrrrrrraaaaaaaaaaaaaallllllllllllllssssssssssss aaaaaaaaannnnndddddddddddddddd eeeeeeeeeeeeeevvvvvvvven create new bbbbbbbbbbbbbbblllllllllllllloooooooooooooodddddddddddd ccccccccceeeeeeeeelllllllllllllllllllllllllllllssssssssssss...skullspineribssternumshoulderhiplimbs1111111111111222222222222226666666666666666 bbbbbbbbbbbbooooooooooooooonnnnnnnnnnnnnesredmarrowcalcifiedmatrixcompactbonepsecondarycalcificationycenterartery(supplies nutrients)ycartilageccccccccccccooooooooooommmmmmmmmmmmmmmpppppppppppppaccccccccccctttttttttttttttbonnnnnnnneeeeeeeeeeeesppppppppppppppppppoongggggggggggggggggyyyyyyyyyyyyyyyyyy bonebbbbbbbbbbbbbbbboooooooooooooone mmmmmmmmmaaaaaaaaaaaaaaaaaaaarrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrroooooooooooooooooooowwwwwwwwwwwwwwThe highly mooooooovvvvvvvvvvabbbbbbbbbblllllleeeeee, rrrrrrrrrrrrreeeeeeeeeeeegggggggggggggiiiiiiiiioooooons of your bbbbbbbbbbbooooooooooooodddddddddddddyyyyyyyyyyyyyy aaaaaaarrrrrrrrrrrrreeeeeeeeeeeeee called your apppppppppppppppendicuuuuuuuuuuullllllllllllaaaaaaaaaaaaarrrr sssssssskkkkkkkkkkkkeeeeeeeeeellllllllllleeeeeeeeeeeetttttooooooooooonnnnnnnnnnnn...... TTTTTTTTTTTThhhhhhhhhiiiiiiiiiiisssssssssssss inclluuuuuuuuuuuuuudddddddddddddddeeeeeeeeeeessssssssssss yyyyyyyyyyyyyoooooooooooouuuuuuuuuuuuuuurrrrrrrrrrrr ssssssssssssssshhhhhhhhhhhhhhhhoooooooooooouuuuldersanddddddddddddd hhhhhhhhhhhhhhiiiiiiiiiippppps aannnnnnnnnnnnnndddddddddddddddd ttttttthe lllllllllllllliiiiiiiiiiiiimmmmmmmmmmmmmbbbbbbbbbbbbbbssssssssssss aaaaaaaaaaatttttttttttttttttttaaaaaaaaaaaaccched to thhhhhhhhhhhhheeeeeeeeeeemmmmmmmmmm... TTTTTTTTTTTTTTThhhhhhhhhhhhhhhhe 126 bones in thhhhhhhhhhhhhhiiiiiiiiiiiiiiisssss pppppppppppaaaaaaaaaaaarrrrrrrrrrrrttttttttt ooooooooooooofffffffffff yyyyyyyyyyyyouuuuuuuuuuuuurrrrrrrrrrrr skkkeeeeeeeeeeeeeellllllllllleeeeeeeeeeeetttttooooooooooonnnnnnnnnnnnn hhhhhhhhhhhhhhhhhelp you turnnnnnnnnnnn aaaaaaaaaannnnnnnnnnndddddddddd tttttttttttwwwwwwwwwwwwwwwwwwwiiiiiiiiiiiiisssssssssssst in many ddddddddddddddddiiiireeeeeeeeeeeeeeecccccccccccctttttttttions aaaaaaaaaaannnnnnnnnnnnd sssssssssuuuuuupporrrrrrrrrrrrrrtttttttttttt aaaa wwwwwwwwwwwwwwwwwiide rannnnnnnnnnnnnnnggggggggggggggggeeeeeeeeeeee of moovvvvvvvvvvvvvveeeeeeeeeeeemmmmmmmmmmmmmmmmmeeeeeeeeeeeeent for your arrrrrrrrrrmmmmmmmmmmmmmmms and leeeeeeeeeeeggggggggggggggs. Bone is a very dyyyyyyyyyyyyyyynnnnnnnnnnnnnammmmmmmmmmmiiiiiiiiiiiiccc tissuuuueeeeeeeeeee wwwwwwwwwwwwwwwwiiithhhhhhhhhh ttttttttttttwwwwwwwwwwwwwwwwwwooooooo key propeeeeeeerrrrrrrrrrrrtttttttttiiiiiiiiiiiiiiieeeesss tttttttttthhhhhhhhhhhhhhhhhhaaaaaaaaaaaaatttttt combine to prooooovvvvvvvvvvvvvvviiiiiiiiiideeeeeeeeeee sssssssssssssttrrrrrrrreeeeeeeeeeennnnnnnnnnnnngggggggggggggggtttttttttthh anddddddddddddddd sssssssssssssuuuuuuuuuuuuuuppppppppppppppppooooooooorrrrrrrrrrrrrrrrtttttttttttttt tttttto your bodddddddddddddyyyyyyyyyyyyyy.... TTTTTTTTTTTTThhhhhhhhhhhheeeeeeeeeeeee outer, smoothhhhhhhhh pppppppppppparrrrrrttttttttttttt ooooooooofffffff bbbbbbbbbbbbbbbbboonnnnnnnnnnneeee iiiiiiiissssssssss mmmmmmmmmmmmmmmaaaade uuppppppppppppp ooooooooooooofffff commmmmmmmmmmmmmmmpppppppppppppppact bone. IIIIIttttttttt looks hard ttttttoooooooooooooo theeeeeeeeeeeee nnnnnnnnnnnaaaaaaaaaaaaakkkkkkkkkkkkkkkkkeeeeedddddddddddddddd eeeeeyyyyyyyyeeeeeeeeeeee aaaaaaaaaaannnnndddddddddd iiiiiiiiissssssssss dddddddddddenselllllllllllyyyyyyyyyyyyy pppppppppppppppackkkkkkkkkkkkkkkeeeeeeeeeeeeeeedddddddddddddd tissue. The inner sssssssssssstttttttttttttruccccccccccccctttttttttttuuuuuuuuuuuuurrrrrrrrrreeeeeeeeeeeee oooooooooooooofffffffffffff bbbbbbbbone is cccccccccccaaaaaaaaaaaaaalllllllllllllllllllleeeeddddddddddd ssssssssssssspppppppppppppooooooooongy bbbbbbbbbbbbbbbbooooooooooonnnnnnnnnne. TTTTTTTTTTTTTThhhhhhhhhhhhhhhhhhhhiiiiis bone tisssssssssuuuuuuuuuuuuue pppppppppppppppppprrrrrrrrrrrrooooooooooooooovvvvvvvvvvvvvviiiiiiiiiiidddddddddddddddeeeeeeeeeeeesss ggggggggggggrrrrrrrrrreeeeeeeeeeeeaaaaaaaaaaaattttttttt strengttttttttthhhhhhhhhhhhhhh,,,,,,,, eeeeeeeeespppppppeeeeeeeeeeeeecccccccccciiiiiiiiiiaaaaaaaally aaattttttttttttt ttttttttttthhhhhhhhhhhhhhhhhhe eeeeeeeeeeennnnnnnnnnnnds of boneeeeeeeeesssssssssssss, beeeeeeeeeeeecccccccccccaaaaaaaaaaaaaaaauuuuuuuuuuuuuuussssssssssssseeeeeeeeeeeee ooofffffffffff iiiiiiiiiiittttttttttssssssss hhhhhhhhhhhhhonnnnnnneeeeeeeeeeeeyyyyyyyyyyyyyyccccccccccccooomb tyypppppppppppppppeeeeeeeeee ssssssssssttrruuuuuuuucccccccccccctttttttttuuuuuuuuuuuurrrrrrrrrrrreeeeeeeeeeeeee. MMMMMMMMMMMost bones in the body begin as cartilage molds that grow and are slowly replaced by bone tissue rich in calciumthat makes the tissue stronger and more rigid. Growth and shaping of bone structure continues throughout our entire life under the effects of gravity and other physical forces. The includes the skull, spine, ribs and sternum, which total 80 bones. These bones anchor the body and have . For example, the only skull bone which can move freely is your jaw bone. jaw
< Page 6 | Page 8 >