what is the hardest bone in the human body?
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Most of the ear is concealed within the head, and its essential sensory and metabolic structures are surrounded by the TEMPORAL or PETROUS bone, the hardest bone of the body; and the hardest bone to break.
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collar bone = clavicle\njaw = mandible\nfingers = carpals, metacarpals\ntoes = tarsals, metatarsals\nfunny bone = humerus\nforearm = radius, ulna\nthigh = femur\ncalf = tibia, fibula\n\njust a few examples.
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femur - the thigh bone
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Bone  is consisted of organic and inorganic parts and has low module of elasticity consequently it is so brittle and  could break down with different kinds of impacts. some materials like Titanium Alloys and Nickel-Cobalt Alloys have outstanding characteristics for bone substituting. these materials show good corrosion resistant and strength in human body .these materials are called bone implants.
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According to the Mohs scale, diamond is the hardest mineral.  I believe that a harder mineral can scratch a softer mineral as well as itself.  So that would work.
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Longest: Femur (thigh bone) about 20% of your height, in an adult male approx 14 - 20 inches\nShortest : Stirrup (in the ear) it is 0.25 to 0.33 cm long
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READ THIS NOW!\ni have always known this one!   : )  \n\nBones- ( as in the human skeleton) is mainly made of a protein called - Collagen(this is the actual word for this protein used in most of our body)!!. bones also contain bone marrow in the centre(this is needed) calcium phosphate and other mineral compounds are then needed to strenghten and further form human bones. you can read the article in the link below to understand this more.\n\ni feel clever compared to the answers above me (jus kidding) . LOL!  : )  please give me 10 points cuz its for your homework   : )\n\n\nread this for your homework answer-( but do not plagiarise ) \nFramework of bones that supports and gives form to the body, protects its internal organs, and provides anchorage points for its muscles. It is composed of about 206 bones. Each bone and cartilage is made of a mineral, calcium phosphate, and protein (collagen). Bones of the skeleton are joined to each other by ligaments. In the human body, walking, running, arm and leg movements, hand actions, and even just standing, are all achieved by the operation of muscles attached to bones of the skeleton. Movement of the body is brought about by the move- able joints of the body. The elbow joint is a good example. Muscles are attached to bones by tendons, and contractions of the muscle bring about movement.
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generally at the end of a long bone..the epiphysis...it is filled with a spongy material called cancellous and red marrow
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http://www.engin.umich.edu/class/bme456/bonefracture/bonefracture.htm
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On average, an adult human has 206 bones (according to Gray's Anatomy, but the number can vary slightly from individual to individual), but a baby is born with approximately 300 bones. The difference comes from a number of small bones that fuse together during growth, such as the sacrum and coccyx of the vertebral column.\n\nThe number of bones per area:\nSkull (22) \nChest (25)\nVertebral column (26)  \nFeet (52) \nHands (54)\n\nSo the hands have the most bones.
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A typical adult human skeleton consists of the following 206 bones.\nIn the skull (22):\n\nCranial bones: \n1. frontal bone \n2. parietal bone (2) \n3. temporal bone (2) \n4. occipital bone \nsphenoid bone \nethmoid bone \nFacial bones: \n5. zygomatic bone (2) \n6. superior and inferior maxilla \n9. nasal bone (2) \n7. mandible \npalatine bone (2) \nlacrimal bone (2) \nvomer bone \ninferior nasal conchae (2) \nIn the middle ears (6):\n\nmalleus (2) \nincus (2) \nstapes (2) \nIn the throat (1):\n\nhyoid bone \nIn the shoulder girdle (4):\n\n25. clavicle or collarbone (2) \n29. scapula or shoulder blade (2) \nIn the thorax (25):\n\n10. sternum \n28. ribs (2 x 12) \nIn the vertebral column (24):\n\n8. cervical vertebrae (7) incl. atlas & axis \n14. lumbar vertebrae (5) \nthoracic vertebrae (12) \nIn the arms (6):\n\n11. humerus (2) \n26. condyles of humerus \n12. ulna (2) \n13. radius (2) \n27. head of radius \nIn the hands (54):\n\nWrist (carpal) bones: \nscaphoid bone (2) \nlunate bone (2) \ntriquetrum bone (2) \npisiform bone (2) \nTrapezium (bone) (2) \ntrapezoid bone (2) \ncapitate bone (2) \nhamate bone (2) \nPalm or metacarpal bones: \nmetacarpal bones (5 × 2) \nFinger bones or phalanges: \nproximal phalanges (5 × 2) \nintermediate phalanges (4 × 2) \ndistal phalanges (5 × 2) \nIn the pelvis (4):\n\n15. ossa coxa (hip bones or innominate bones) (2) \n16. sacrum \ncoccyx \nIn the legs (8):\n\n17. femur (2) \n22. greater trochanter of femur \n23. condyles of femur \n19. patella (2) \n20. tibia (2) \n21. fibula (2) \nIn the feet (52):\n\nAnkle (tarsal) bones: \ncalcaneus (heel bone) (2) \ntalus (2) \nnavicular bone (2) \nmedial cuneiform bone (2) \nintermediate cuneiform bone (2) \nlateral cuneiform bone (2) \ncuboidal bone (2) \nInstep bones: \nmetatarsal bone (5 × 2) \nToe bones: \nproximal phalanges (5 × 2) \nintermediate phalanges (4 × 2) \ndistal phalanges (5 × 2) \nThe infant skeleton has the following bones in addition to those above:\n\nsacral vertebrae (4 or 5), which fuse in adults to form the sacrum \ncoccygeal vertebrae (3 to 5), which fuse in adults to form the coccyx \nilium, ischium and pubis, which fuse in adults to form the pelvic girdle
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If you're talking human body, it's the Gluteus maximus.\nA bird... the breast/pectoralis muscle... but I'm assuming you meant humans.  ;)
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What do you mean?   Bones are made mostly of calcium.   There's a disease called osteoporosis which causes calcium to be removed from bones and weakens the bones.   I don't know if it is painful, but I don't believe it is.
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Hedgehog.\n\nAll the softest creatures have the hardest, most-spiny shells.
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That would be the coccyx (bone).  The socket for the head of the femur in this bone is called the acetabulum
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Kidney. Although it really depends on your definition of solid.
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There are 206 bones in the human body.