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	Bone marrow - Wikipedia, the free encyclopedia
		Bone marrow (or "medulla ossea") is the tissue comprising the center of large bones.
		Large amounts of red bone marrow can also be found in flat bones like those of the ribs, pelvis and skull.
		Bone marrow is a source of protein and high in monounsaturated fats.
	en.wikipedia.org /wiki/Yellow_marrow (357 words)

	Leukemia - Bone Marrow & Blood Formation - oncologychannel
		The marrow is the principal site for hematopoiesis (blood formation), which, after birth, occurs primarily within the bones of the legs, arms, ribs, sternum (breastbone), and vertebrae (backbones).
		Other types of bone marrow abnormalities, such as myeloproliferative disorder, a disease in which bone marrow cells multiply outside of the bone marrow tissue, or myelodysplastic ("preleukemia") syndromes, are the result of marrow dysfunction in either the stem cells or progenitor cell lines.
		Lymph is the transparent, slightly yellow, liquid that is collected from the body's tissues, and chyle is the milky fluid taken from food in the intestine during digestion.
	www.oncologychannel.com /leukemias/bonemarrow.shtml (1749 words)

	Bone Marrow Aspirations
		People are born with only red marrow, and as we grow, some of the red marrow is replaced with yellow.
		Marrow may also contain abnormal cells that are not usually present, such as cancer cells.
		A bone marrow procedure (commonly referred to as a bone marrow aspiration) is a technique used to obtain the blood-forming portion (red marrow) of the inner core of bone for examination in the laboratory.
	www.hpath.com /PatientInfo/bonemarrow.htm (432 words)

	Bone Marrow
		In the adult, red bone marrow is found in portions of the vertebrae, sternum, ribs, skull, scapulae, pelvis, and proximal limb bones, collectively known as flat and irregular bones.
		Yellow marrow is found in the hollow center of the diaphysis (the long shaft of the bone) known as the medullary cavity.
		Bone marrow stem cells are the most primitive cells in the bone marrow and consist of of packed hematopoietic, reticular, and adipose cells.
	www.innvista.com /HEALTH/anatomy/marrow.htm (409 words)

	Encyclopedia :: encyclopedia : Bone marrow (Site not responding. Last check: 2007-09-22)
		Bone marrow is the tissue comprising the center of large bones.
		Hematopoietic stem cells give rise to the three classes of blood cell that are found in the circulation: leukocytes, red blood cells (erythrocytes), and platelets (thrombocytes).
		The actual health effects of the addition of bone marrow to the diet is unknown.
	www.hallencyclopedia.com /Bone_marrow (302 words)

	bone marrow
		Bone marrow occupies the spaces between the spicules of cancellous bone, and the interior of the diaphyses of long bones.
		Not much red bone marrow is needed to supply the animal with blood cells.
		yellow bone marrow consists largely of adipose tissue.
	www.ndsu.nodak.edu /instruct/tcolvill/135/bone_marrow.htm (67 words)

	Bone Marrow Disease -- Recommendations and Resources
		Bone marrow suppression due to anti-cancer chemotherapy is much harder to treat and often involves hospital admission, strict infection control, and aggressive use of intravenous antibiotics at the first sign of infection.
		Other patients who receive bone marrow transplants include pediatric cases where the patient has an inborn defect such as severe combined immunodeficiency or congenital neutropenia and was born with either no blood stem cells or defective stem cells.
		In a bone marrow donation, bone marrow is surgically removed from a large bone of the donor, typically the sternum or the hip, by a large needle that reaches the center of the bone.
	www.becomingapediatrician.com /health/21/bone-marrow-disease.html (1331 words)

	Components
		All human bone marrow is red until about the age of seven because the need for new blood formation is high.
		Red bone marrow is found in adults only in the vertebrae, hips, breastbone, ribs, skull, and the ends of long bones.
		Yellow ligaments are rich in elastic fibers which allow movement.
	members.tripod.com /projectskeletal/Components.htm (549 words)

	Bone marrow aspiration and biopsy
		Bone marrow aspiration, also called bone marrow sampling, is the removal by suction of fluid from the soft, spongy material that lines the inside of most bones.
		In a bone marrow aspiration, a special needle is inserted beneath the skin and rotated until it penetrates the cortex, or outer covering of the bone.
		At least half a teaspoon of marrow is withdrawn from the bone by a syringe attached to the needle.
	www.healthatoz.com /healthatoz/Atoz/ency/bone_marrow_aspiration_and_biopsy.jsp (1316 words)

	HighBeam Encyclopedia - bone marrow
		Red marrow is the principal organ that forms blood cells in mammals, including humans (see blood).
		In adults red marrow remains chiefly in the ribs, the vertebrae, the pelvic bones, and the skull.
		The transplant can be autologous, consisting of bone marrow removed from the patient, treated, and then reinserted, or it can be allogeneic, consisting of healthy bone marrow obtained from a closely related donor, such as a sibling (see transplantation, medical).
	www.encyclopedia.com /html/b1/bonemar.asp (607 words)

	Structure and Function of Bone Marrow in Dogs - PetPlace.com (Site not responding. Last check: 2007-09-22)
		Bone marrow is the soft, spongy material found in the central cavity of the long bones of the body.
		Bone marrow consists of connective tissue that forms a delicate meshwork within the marrow cavity of bones, and it is permeated by numerous thin-walled blood vessels.
		Yellow marrow is made up mostly of fatty tissue and is located in the shafts of long bones.
	www.petplace.com /dogs/structure-and-function-of-bone-marrow-in-dogs/page1.aspx (1060 words)

	Red Gold . Blood Basics . Blood in the Body . How Is Blood Produced? \| PBS
		Blood cells are produced in the bone marrow, a jellylike substance inside the bones that is composed of, among other things, fat, blood, and special cells that turn into the various kinds of blood cells.
		Bone marrow that actively produces blood cells is called red marrow, and bone marrow that no longer produces blood cells is called yellow marrow.
		As the blood cells develop from the stem cells in the marrow, they seep into the blood that passes through the bones and on into the bloodstream.
	www.pbs.org /wnet/redgold/basics/bloodproduction.html (247 words)

	Chapter 3
		Bone marrow which is active in this respect is red in color and is called red marrow; whereas, non-productive resting marrow is called yellow marrow.
		Red marrow is found throughout life in flat bones (vertebrae, ribs, pelvis and bones of the head) and the proximal ends of long bones (femur, humerus).
		The degree of yellow pigmentation of the plasma is referred to as the icterus index which is compared against a dilution of potassium dichromate.
	compepid.tuskegee.edu /syllabi/pathobiology/pathology/clinpath/chapter3.html (7065 words)

	Bone Marrow Scintigraphy
		Prior to birth, splenic and hepatic hematopoiesis disappear, and gradually thereafter hematopoietic tissue (red marrow) is replaced by fat (yellow marrow) beginning in the distal bones and retracting to the adult pattern by age ten.
		In the adult, hematopoietic marrow is confined to the axial skeleton and proximal portions of the humerus and femur.
		Bone marrow scans are evaluated for the presence or absence of activity in the central marrow, for peripheral extension, and for any focal defects for comparison with white blood cell scans.
	www.med.harvard.edu /JPNM/TF96_97/Feb11/WriteUp.html (1145 words)

	bone marrow. The Columbia Encyclopedia, Sixth Edition. 2001-05
		As the skeleton matures, fat-storing yellow marrow displaces red marrow in the shafts of the long bones of the limbs.
		The marrow releases about 10 million to 15 million new erythrocytes every second, while an equivalent number are destroyed by the spleen.
		A bone marrow biopsy, in which a small sample of bone marrow is obtained by aspiration through a thin needle, may be used to aid in the diagnosis of leukemia, anemia, and other blood disorders, as well as to gain insight on the normal functioning of the cells of the bone marrow.
	www.bartleby.com /65/bo/bonemar.html (347 words)

	Untitled Document
		In normal marrow there are two populations of protons (water and fat protons), and the two populations are more or less balanced.
		In the adult, the active red marrow of the body is found mostly in the axial skeleton.
		Primary and secondary marrow malignancies preferentially infiltrate areas of active hematopoiesis, so the spine and pelvis are commonly affected.
	spinwarp.ucsd.edu /NeuroWeb/Text/sp-340mar.htm (308 words)

	[No title] (Site not responding. Last check: 2007-09-22)
		The bone marrow is described in this work as a cylindrical core of blood, surrounded by concentric cylindrical shells of marrow tissue, and enclosed within a cylindrical shell of trabecular bone.
		The ratio of red marrow to yellow, fatty (adipose) marrow within the trabecular cavity is represented by three distributions: homogenous, linearly increasing, and exclusively existing (well defined).
		The homogenous distribution of the marrow tissue leads to the recommended central value while the composite model (marrow cavity filled with a homogenous mixture of blood, red and yellow marrow) and the well defined red marrow distribution lead to the recommended upper and lower limits, respectively.
	www.engg.ksu.edu /NEDEPT/theses/abbay.html (462 words)

	Untitled Document (Site not responding. Last check: 2007-09-22)
		Although many lymphocytes are found in bone marrow, they are formed in lymphatic tissues and carried to the bone marrow by the bloodstream.
		Myeloid tissue (bone marrow) and lymphatic tissue together constitute the hemopoietic, or blood cell-forming, tissues of the body.
		The red bone marrow is the myeloid tissue that is actually producing blood cells.
	www.vet.purdue.edu /bms/nour/bms520/content/blood/leukocytes3.htm (161 words)

	health.com :: iron deficiency anemia
		Bone marrow: soft, spongy tissue in the center of bones.
		Yellow marrow contains fat; red marrow produces red and white blood cells and platelets for blood clotting.
		Bone marrow biopsy: test that checks the number of blood cells in the bone marrow by inserting a special needle into the bone and removing a piece of bone (a plug) with marrow.
	www.health.com /health/wynks/AnemiaIronWYNK2000-MAL/somewords.html (340 words)

	BIOL 237 Class Notes - Skeletal System
		red marrow - myeloid (blood producing) tissue found in the spaces in the spongy bone, produces both red and white blood cells.
		Red marrow does not increase in proportion to bone growth, and in the adult much of the red marrow changes to yellow (fatty) marrow, especially in the medullary canal.
		With the death of the chondrocytes the matrix breaks down resulting in early formation of the marrow cavity.
	www.unm.edu /~jimmy/skeletal_notes.htm (1793 words)

	Article : Pictorial Essay - MR Appearances of Osseous Spine Tumors ; Author : B N Lakhkar ; Co-Author(s) : M Aggarwal, ... (Site not responding. Last check: 2007-09-22)
		The MR appearances of marrow in any particular bone reflects a combined effect of the relative fractions of red marrow, yellow marrow and trabecular bone.
		As conversion of red to yellow marrow occurs in the spine, yellow marrow may replace red marrow in a more focal (rather than diffuse) pattern, resulting in a spotty appearance (bright spots in T2 images) of the bone marrow.
		Bone marrow infiltration precedes osseous destruction and hence MRI is highly sensitive in detecting early marrow infiltration.
	www.ijri.org /articles/archives/2002-12-3/musculo_383.htm (3450 words)

	[No title]
		(The yellow bone marrow is primarily composed of fat, but, in response to a greater need for RBC production, the yellow bone marrow can turn to red marrow.) The red bone marrow of essentially all bones produces RBCs from birth to about five years of age.
		Above age 20, most RBCs are produced primarily in the marrow of the vertebrae, the sternum, the ribs, and the pelvis.
		As these cells mature, they extrude their nucleus as they slowly fill with hemoglobin until they are bright red reticulocytes ready to escape the bone marrow and squeeze into the blood capillaries to begin circulating around the body.
	www.nsbri.org /humanphysspace/focus3/erythropoiesis.html (696 words)

	MR Imaging Characteristics of Cranial Bone Marrow in Adult Patients with Underlying Systemic Disorders Compared with ...
		marrow was iso- or hyperintense relative to WM (Figs 1 and 2);
		The marrow in the diploic space is diffusely abnormal (arrows), because the normal fat has been replaced by hematopoietic tissue, with resultant signal that is hypointense relative that of the adjacent WM and GM.
		characteristics of cranial marrow (6, 11, 12, 17).
	www.ajnr.org /cgi/content/full/23/2/248 (3725 words)

	Bone marrow
		It is made up of red marrow, which produces red and white blood cells and platelets, and yellow marrow, which contains fat and connective tissue and produces some white blood cells.
		As a person matures, the red marrow in many of the bones is replaced by yellow marrow.
		Red bone marrow is found mostly in the ribs, breastbone, shoulder blades, collarbones, hip bones, skull, and spine.
	www.webmd.com /hw/health_guide_atoz/stb117081.asp (129 words)

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