What is the differrence in organelle concentration of osteocytes and osteoblasts?

Question

Thanks for the great response, but I was curious with the organelle differences. Sure they have a nucleaus, and some mitochondria. I am thinking some Golgi and Endoplastic reticulim but do they both have this?

Answer 1

The cytoplasm of osteoblasts appears to be basophilic via normal H&E stain due to presence of large amount of rough endoplasmic reticulum A large Golgi apparatus is also present in the centre. The nucleus is spherical and large.

Osteoblasts that become trapped in the bone matrix become osteocytes.

Osteocytes are mature, nondividing bone cells that are located within their own lacunae (small cavities in the bone). Osteocytes are derived from osteoblasts and they represent the final stage of maturation of the bone cell lineage. They are smaller and less active than osteoblasts. Most osteocytes have a minimal amount of rough endoplasmic reticulum, an abundance of heterocromatin and a relatively small Golgi apparatus. The narrow, cytoplasmic processes of osteocytes remain attached to each other and to osteoblasts through canaliculi (small channels in the bone). Nutrients from blood vessels outside the bone matrix diffuse to the osteocytes both through the canaliculi surrounding the cell processes and through the cells themselves via gap junctions. These gap junctions also allow intercellular communication to occur. Since the effective diffusion distance is limited, osteocytes cannot survive more than 0.2 mm away from a blood vessel.

Answer 2

Osteoblasts that become trapped in the bone matrix become osteocytes. They cease to generate osteoid and mineralized matrix, and instead act in a paracrine manner on active osteoblasts. They are believed to act in a mechanosensory manner.

An osteoblast is a mononucleate cell that is responsible for bone formation. Osteoblasts produce osteoid, which is composed mainly of Type I collagen. Osteoblasts also are also responsible for mineralization of the osteoid matrix. Bone is a dynamic tissue that is constantly being reshaped by osteoblasts, which build bone, and osteoclasts, which resorb bone.

An osteocyte, a star-shaped cell, is the most abundant cell found in bone. Once osteoblasts become trapped in the matrix they secrete, they become osteocytes. Osteocytes are networked to each other via long processes that occupy tiny canals called canaliculi, which are used for exchange of nutrients and waste. The space that an osteocyte occupies is called a lacuna (Latin for a pit). Although osteocytes have reduced synthetic activity and, like osteoblasts are not capable of mitotic division, they are actively involved in the maintenance of bony matrix, through various mechanosensory mechanisms.

Answer 3

Osteoblast is a cell responsible for bone formation. Osteocyte is a cell found in bone. Osteo-bone Blast-germ Cyte-cell