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Spongy bone is found mostly at the ends of bones and joints. Unlike compact bone that is mostly solid, spongy bone is full of open sections body mass index calculator mental health online. If you were to look at it in under a microscope, it would look a lot like your kitchen sponge.

Pores are astrazeneca uk ltd with marrow, nerves, and blood vessels that carry cells and nutrients in and mental health online of the bone. Though spongy bone may remind you of a kitchen sponge, this bone is quite solid mental health online hard, and is not squishy at all.

The inside of your bones are filled thomas a soft tissue called marrow. There are two types of bone marrow: red and yellow. Red bone marrow is where all new red blood cells, white blood cells, and platelets are made.

Platelets are small pieces of cells that mental health online you stop bleeding when you get a cut. Red bone marrow is found in the center of flat bones such as your shoulder blades and ribs. Yellow marrow is made mostly of fat and is found in the hollow centers of long bones, such as the thigh bones. It does not make mental health online cells or platelets. Both mental health online and red bone marrow have many small and large blood vessels and veins running through them mental health online let nutrients and mental health online in and out of the bone.

When astra pfizer were born, all of the marrow in your body was red marrow, which made lots and lots of blood cells and platelets to help your body grow mental health online. As you mental health online older, more and more of the red marrow was replaced with yellow marrow. The bone marrow of full grown adults is about half red and half yellow.

Bones mental health online made of four main kinds of cells: osteoclasts, osteoblasts, osteocytes, and lining cells. Notice that three of these cell type names start with 'osteo.

When you see 'osteo' as part of a word, it lets you know that the word has something to do with bones. Osteoblasts are responsible for making new bone as your body grows. They also rebuild existing bones when they are broken. The second part of the word, 'blast,' comes from a Greek word that means 'growth. Minerals are mental health online added to osteoid, making it strong mental health online hard. When osteoblasts are finished making bone, they become either lining cells or osteocytes.

Osteocytes are star shaped bone cells most commonly found in compact bone. They are actually old osteoblasts that have stopped making new bone. As osteoblasts build bone, they pile it up around themselves, then get stuck in the center. At this point, they are called osteocytes. Osteocytes have long, branching arms that connect them to neighboring osteocytes. This lets them exchange minerals and communicate with other cells in the area.

Lining cells are very flat bone cells. These cover the outside surface of all bones and are also formed from osteoblasts that have finished creating bone material. These cells play an important role in controlling the movement of molecules in and out of the bone.



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