Both compact bone and spongy bone are parts of the bone tissue. Compact bones are the hard exterior, while spongy bones are the porous interior structures of bone tissue.
Is compact bone the strongest?
Compact bone is the heaviest, hardest type of bone . It needs to be very strong as it supports your body and muscles as you walk, run, and move throughout the day. About 80% of the bone in your body is compact. It makes up the outer layer of the bone and also helps protect the more fragile layers inside.
Is compact or spongy bone stronger?
Compact bone is the denser, stronger of the two types of osseous tissue
How do compact and spongy bone differ?
Compact bone is dense and composed of osteons , while spongy bone is less dense and made up of trabeculae.
Are spongy bones strong?
Cancellous bone is usually surrounded by a shell of compact bone, which provides greater strength and rigidity . The open structure of cancellous bone enables it to dampen sudden stresses, as in load transmission through the joints.
What percent of bone is compact bone?
Compact bone makes up 80 percent of the human skeleton; the remainder is cancellous bone, which has a spongelike appearance with numerous large spaces and is found in the marrow space (medullary cavity) of a bone.
Is trabeculae found in compact bone?
Compact bone is dense and composed of osteons, while spongy bone is less dense and made up of trabeculae. Blood vessels and nerves enter the bone through the nutrient foramina to nourish and innervate bones.
What is Osteon in compact bone?
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).
What makes compact bone?
Compact bone consists of closely packed osteons or haversian systems . The osteon consists of a central canal called the osteonic (haversian) canal, which is surrounded by concentric rings (lamellae) of matrix. ... In compact bone, the haversian systems are packed tightly together to form what appears to be a solid mass.
Are bone forming cells?
Osteoblasts are bone-forming cells, osteocytes are mature bone cells and osteoclasts break down and reabsorb bone. ... There are two types of ossification: intramembranous and endochondral.
What are the 3 major functions of bone give examples of where we would see each?
- Mechanical. Support. Bones provide a framework for the attachment of muscles and other tissues. ...
- Protective. Bones such as the skull and rib cage protect vital organs from injury. Bones also protect the marrow.
- Metabolic. Mineral storage.
What are bone cavities called?
83698. Anatomical terminology. The medullary cavity (medulla, innermost part) is the central cavity of bone shafts where red bone marrow and/or yellow bone marrow (adipose tissue) is stored; hence, the medullary cavity is also known as the marrow cavity.
Do osteoblasts make bone?
OSTEOBLASTS are the cells that form new bone . They also come from the bone marrow and are related to structural cells. ... They produce new bone called “osteoid” which is made of bone collagen and other protein. Then they control calcium and mineral deposition.
What is the purpose of spongy bone?
Spongy bone reduces the density of bone and allows the ends of long bones to compress as the result of stresses applied to the bone . Spongy bone is prominent in areas of bones that are not heavily stressed or where stresses arrive from many directions.
Is spongy bone good for shock absorption?
The articular cartilage-spongy bone system reacts to certain dynamic loads as a shock absorber like medical silicone rubber owing to the similarity of the dynamic properties of cartilage and rubber.
What fills the space between the trabeculae of spongy bone?
The spaces between the trabeculae are filled with marrow . Each trabecula consists of several lamellae with osteocytes between the lamellae.
