![]() red blood cells, which deliver oxygen to cells.Osteoclasts help remodel injured bones and create pathways for nerves and blood vessels to travel through.īone marrow is present in almost all bones where cancellous, or spongy, bone is present.īone marrow produces blood cells, including: They use acids resulting from certain reactions to break down used bone. Osteoclasts are large cells with more than one nucleus.They communicate with other bone cells and help support metabolic functions within the bone. Osteocytes are inactive osteoblasts that are mineralized and remain within the bone they have created.They produce a protein mixture that doctors call osteoid, which is mineralized and becomes bone. Osteoblasts are responsible for generating and repairing bone.There are three main cell types involved in this process. The bones contain 99% of the body’s calcium.īones have an internal structure similar to a honeycomb, which makes them rigid yet relatively light.īones are not static tissue but need constant maintenance and remodeling. The mineral calcium phosphate hardens this framework, giving it strength. The largest bone in the human body is the thighbone, or femur, and the smallest is the stapes in the middle ear, at around 3 millimeters long.īones consist mostly of the protein collagen, which forms a soft framework. The reason for the difference is that some people have more or fewer bones in their ribs, vertebrae, fingers, and toes. As they grow, some fuse.īy adulthood, people have between 206 and 213 bones. At birth, humans have around 270 soft bones. The skeleton accounts for around 15% of body weight. Also, they provide an environment for bone marrow, where the body creates blood cells, and they act as a storage area for minerals, particularly calcium. Their functions include supporting body structure, protecting vital organs, and allowing the body to move. In this article, we explain their function, what they consist of, and the types of cells they involve.īones are living, active tissues that the body is constantly remodeling. Bones come in all shapes and sizes and have many roles. “I will hear what these small horses have to teach.Bones are more than just the scaffolding that holds the body together. “Marsh.” Red Cloud tested the name out loud, and then nodded in approval. He shouted again to his men, in Sioux, and they lowered their rifles. The chief looked down at the skull, then at Marsh. “Where are these small horses? Show me one.” The other Sioux laughed, but Red Cloud was fascinated. “Precisely,” said Marsh, indicated the size with his hands. The chief reached down and took the skull gingerly, and peered at it intently, turning it in his enormous but surprisingly dexterous hands. Marsh held the tiny skull up alongside the head of Red Cloud’s mount, comparing the two. ![]() You’ve seen a horse’s bones, haven’t you?” Marsh couldn’t help but become a little defensive. “The white eye should stay out of the sun,” said the chief. ![]() The chief smiled slightly, and then shouted something to his men in Sioux. You’ve never had a restless night from imagining someone deboning a human body while blaring ‘Waterloo’ or ‘Fernando’. He never borrowed music from us again – he claimed our music was too disturbing and dark, and shunned our offerings of Ministry and Nine Inch Nails in favor of something nice and happy by Abba. Other times I listened in horror as my favorite Thomas Dolby songs were accompanied by an annoying high-pitched buzzsaw whine that altered as if it had entered some sort of solid tissue. The strange thumps sometimes suggested that he’d gotten a live one downstairs and was merrily bashing in their skull in the name of his psoriasis to the tune of ‘It’s My Life’ by Talk Talk. I tried not to think about why he was playing the music, but it was a little hard not to think about. The next weekend, we had gone right back to the 80’s with the Missing Persons and Dead or Alive. Sam had jokingly given him an Einstürzende Neubauten CD on the premise that his tools would blend right in to the music, and he’d returned it the next day, saying it was too suspicious-sounding and made him very nervous for some reason. So was Duran Duran’s ‘Hungry like the Wolf’. It was a litany of 70’s and 80’s music.īlondie, Heart of Glass was on the list. This was basically a list of songs that our serial killing landlord had blared at one time or another at top volume to cover the sound of his heavy electric power tools. It had turned into a list of Songs That You Would Never See In The Same Light Again. The blackboard in the kitchen had once been installed as a way of communication for the house. “Lloyd moved to the blackboard and wrote ‘Maneater, Hall and Oates’ at the bottom of a long list of songs and artists. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |