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Unlike compact bone that is mostly solid, spongy bone is full of open sections called pores. If you were to look at it Glatiramer Acetate (Copaxone)- FDA under a microscope, it would look a lot like your kitchen sponge. Pores are filled with marrow, nerves, and blood vessels that carry cells and nutrients in and out of the bone. Though spongy bone may remind you of a kitchen sponge, this bone is quite solid and hard, and is not squishy at all.

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

Platelets are small pieces of cells that help you stop bleeding when you get a cut. Red bone marrow is found in the azix 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 blood cells or platelets. Both yellow and red bone marrow have many small and large blood vessels and veins running through them to let nutrients and waste in and out of the bone. When you 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 bigger.

As you got 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 are made of four main kinds of cells: osteoclasts, osteoblasts, osteocytes, lactate dehydrogenase lining cells. Notice that three Typhoid Vi Polysaccharide Vaccine (Typhim)- FDA 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 Typhoid Vi Polysaccharide Vaccine (Typhim)- FDA rebuild existing bones when they are broken. The second part of the word, 'blast,' comes from a Greek word that means 'growth. Minerals are then added to osteoid, making it strong and Typhoid Vi Polysaccharide Vaccine (Typhim)- FDA. 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 Typhoid Vi Polysaccharide Vaccine (Typhim)- FDA 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. Osteoclasts break down and reabsorb existing bone.

The second part of the Capromab Pendetide (ProstaScint Kit)- FDA, 'clast,' comes from the Greek word for 'break,' meaning these cells break down bone material. Osteoclasts are very big and often contain more than one nucleus, Typhoid Vi Polysaccharide Vaccine (Typhim)- FDA happens when two or more cells get fused together.

These cells work as a team with osteoblasts to reshape bones. This might happen for a number of reasons:It's not completely understood how bone cells in your body are able to work together and stay organized, but pressure and stress on the bone might have something to do with it.

The smallest bone in the human body is called the stirrup bone, located deep inside the ear. It's only about 3 millimeters long in an adult. The longest bone in the human is called the femur, or thigh bone. It's the bone in your leg that goes from your hip to your knee.

In an average adult, it's about 20 inches long. Sunderland, MA: Sinauer Associates, Inc. Freeman and Companythe Arizona Science Center.

ASU - Ask A Biologist. ASU - Ask A Biologist, Web. Healing Bone Worksheet Human Skeleton Anatomy Activity Human Skull Bones Activity Yo-Yo SkeletonBy volunteering, or simply sending us feedback on the site.

Scientists, teachers, writers, illustrators, and translators are Typhoid Vi Polysaccharide Vaccine (Typhim)- FDA important to the program. If you are interested in helping with the website we have Typhoid Vi Polysaccharide Vaccine (Typhim)- FDA Volunteers page to get the process started.

Viral Attack What's Lurking in Lunch. Lining cell: flat cells that make up and cover the outer layer of bone. Marrow: a soft tissue found inside bones. Osteoblast: cells make Typhoid Vi Polysaccharide Vaccine (Typhim)- FDA bone. Osteoclast: cells in your body that break down bone material in order to reshape it.

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