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[[Image:LH Bone Marrow 1 Histology.jpg|thumb|200px|'''Bone Marrow''' ©RVC 2008]]
[[Image:LH Bone Marrow 1 Histology.jpg|thumb|200px|'''Bone Marrow''' ©RVC 2008]]
==Introduction==
==Introduction==
Bone marrow is referred to as [[#Red marrow|red]] or [[#Yellow marrow|yellow]]. Red bone marrow is involved with [[Haemostasis|haemostasis]] while yellow bone marrow is adipose tissue. Bone marrow occupies the cavities in [[Bones - Anatomy & Physiology#Types of Bone|long bones]] and spaces in [[Bones - Anatomy & Physiology#Types of Bone|spongy bones]].
Bone marrow is referred to as [[#Red marrow|red]] or [[#Yellow marrow|yellow]]. Red bone marrow is involved with [[Haemostasis|haemostasis]] while yellow bone marrow is adipose tissue. Bone marrow occupies the cavities in [[Bones - Anatomy & Physiology#Types of Bone|long bones]] and spaces in [[Bones - Anatomy & Physiology#Lamellar bone|spongy bones]].
==Development==
==Development==
<p>Pluripotential haematopoietic stem cells (PPSC) migrate into bones from the [[Haematopoiesis - Overview#Yolk Sac Phase|embryonic yolk sac]] and the [[Haematopoiesis - Overview#Foetal|foetal liver]] during development, a process called homing. The cells then associate closely with the connective tissues within the bone. The PPSCs continue to constantly divide in the bone marrow with one daughter cell remaining a pluripotential stem cell and the other daughter cells developing into multipotential haematopoietic stem cells. The multipotential stem cells also constantly divide with some daughter cells remaining stem cells and the other daughter cells developing into blood cells ([[Haematopoiesis - Overview|haematopoiesis]]).</p>
<p>Pluripotential haematopoietic stem cells (PPSC) migrate into bones from the [[Haematopoiesis - Overview#Yolk Sac Phase|embryonic yolk sac]] and the [[Haematopoiesis - Overview#Foetal|foetal liver]] during development, a process called homing. The cells then associate closely with the connective tissues within the bone. The PPSCs continue to constantly divide in the bone marrow with one daughter cell remaining a pluripotential stem cell and the other daughter cells developing into multipotential haematopoietic stem cells. The multipotential stem cells also constantly divide with some daughter cells remaining stem cells and the other daughter cells developing into blood cells ([[Haematopoiesis - Overview|haematopoiesis]]).</p>