- 1 What is the difference between trabecular and cortical bone?
- 2 How the anatomy of compact bone differs from that of spongy bone?
- 3 What is the function of Trabeculae?
- 4 What is a osteoblast in anatomy?
- 5 Where is cortical bone found in the body?
- 6 What are the four bone shapes?
- 7 What are the five many bone types?
- 8 What are two characteristics of compact bone?
- 9 What is the metaphysis?
- 10 What are Trabeculae in anatomy?
- 11 What is a Trabecula?
- 12 What is Osteon?
- 13 Why is it called osteoblast?
- 14 What is osteoblast function?
- 15 How many osteoblasts are in the human body?
What is the difference between trabecular and cortical bone?
The material properties of the bone compartments differ: trabecular bone has lower calcium content and more water content compared to cortical bone. Trabecular bone has a large surface exposed to the bone marrow and blood flow, and the turnover is higher than in cortical bone .
How the anatomy of compact bone differs from that of spongy bone?
Whereas compact bone tissue forms the outer layer of all bones, spongy bone or cancellous bone forms the inner layer of all bones. Spongy bone tissue does not contain osteons that constitute compact bone tissue. Instead, it consists of trabeculae, which are lamellae that are arranged as rods or plates.
What is the function of Trabeculae?
Trabeculae of bone provide structural support to the spongy bone found at the ends of long bones.
What is a osteoblast in anatomy?
OSTEOBLASTS are the cells that form new bone. They also come from the bone marrow and are related to structural cells. They have only one nucleus. Osteoblasts work in teams to build bone. They produce new bone called “osteoid” which is made of bone collagen and other protein.
Where is cortical bone found in the body?
Cortical bone tissue is mostly located in the outer layer of the long bones forming the shaft and inner part of the trabecular bone at the proximal and distal ends of the bone tissue. Moreover, it constitutes about 80% of the total mass of the skeleton in our body.
What are the four bone shapes?
The four principal types of bones are long, short, flat and irregular. Bones that are longer than they are wide are called long bones.
What are the five many bone types?
There are five types of bones in the skeleton: flat, long, short, irregular, and sesamoid.
What are two characteristics of compact bone?
Compact bone, also called cortical bone, dense bone in which the bony matrix is solidly filled with organic ground substance and inorganic salts, leaving only tiny spaces (lacunae) that contain the osteocytes, or bone cells.
What is the metaphysis?
The metaphysis is the trumpet-shaped end of long bones. Much bone remodeling occurs in the metaphyseal region of a bone after a fracture. Periosteal bone forms in the area joining the diaphysis to the epiphysis.
What are Trabeculae in anatomy?
Trabecula: A partition which divides or partly divides a cavity. One of the strands of connective tissue projecting into an organ that constitutes part of the framework of the organ as, for example, the trabeculae of the spleen.
What is a Trabecula?
1: a small bar, rod, bundle of fibers, or septal membrane in the framework of a body organ or part.
What is Osteon?
Osteon, the chief structural unit of compact (cortical) bone, consisting of concentric bone layers called lamellae, which surround a long hollow passageway, the Haversian canal (named for Clopton Havers, a 17th-century English physician).
Why is it called osteoblast?
In living bone, the cells are linked by tight junctions and gap junctions, and integrated with underlying osteocytes and matrix H&E stain. Osteoblasts (from the Greek combining forms for “bone”, ὀστέο-, osteo- and βλαστάνω, blastanō “germinate”) are cells with a single nucleus that synthesize bone.
What is osteoblast function?
Osteoblasts are specialized mesenchymal cells that synthesize bone matrix and coordinate the mineralization of the skeleton. The unique function of osteoblasts requires substantial amounts of energy production, particularly during states of new bone formation and remodelling.
How many osteoblasts are in the human body?
They may be reactivated to form osteoblasts. Osteocytes are cells lying within the bone itself and are ‘entrapped’ osteoblasts. They are post-proliferative, representing the most mature differentiation state of osteoblast lineage. There are about 25,000 osteocytes per mm3 of bone.