Compact bone has a sturdy calcified matrix with very few spaces. This layer not only forms a protective shell around the spongy bone tissue, but it also gives our bones their rigidity, strength, and resistance.
The compact bone is the main structure in the body for support, protection, and movement. Due to the strong nature of compact bone, compared to spongy bone, it is the preferred tissue for strength. Spongy bone is used for more active functions of the bones, including blood cell production and ion exchange.
Compact bone is very hard and strong. Spongy bone is found inside bones and is lighter and less dense than compact bone. This is because spongy bone is porous. Bone marrow is a soft connective tissue that produces blood cells.
Compact bone tissue forms the outer layer of all bones while spongy or cancellous bone forms the inner layer of all bones. Spongy bone tissue does not contain osteons. Instead, it consists of trabeculae, which are lamellae that are arranged as rods or plates. Red bone marrow is found between the trabuculae.
There are five types of bones in the skeleton: flat, long, short, irregular, and sesamoid. Let's go through each type and see examples.
Compact bone is composed of cylindrical units, called osteons, which are formed from layers of concentric circles, called lamellae, around a central canal containing blood vessels and nerve fibers.
Compact Bone
It can be found under the periosteum and in the diaphyses of long bones, where it provides support and protection. The microscopic structural unit of compact bone is called an osteon, or Haversian system.Inside each osteon is a space called a central canal, which houses blood vessels and nerves within the bone. These vessels supply blood to the interior spongy bone as well as the living cells housed within the compact bone. That's right… bone is actually a living tissue!
Long Bone: formed by outer layer of compact bone, spongy bone, which lies beneath compact bone, may contain red bone marrow. The central shaft of long bone contains yellow marrow, a form of stored fat.
The adult human skeleton usually consists of 206 named bones. These bones can be grouped in two divisions: axial skeleton and appendicular skeleton. The 80 bones of the axial skeleton form the vertical axis of the body. They include the bones of the head, vertebral column, ribs and breastbone or sternum.
Compact Bone (definition) Hard, dense bone tissue that is beneath the outer membrane of a bone. Spongy Bone (definition) Layer of bone tissue having many small spaces and found just inside the layer of compact bone.
There are also conditions that can affect cartilage health, and because articular cartilage doesn't renew, and every stress or damage that is put on the cartilage is permanent. “The damage can cause the bones to rub and increase friction and causes knobs to grow on the bone and cause osteoarthritis,” Miranda said.
Cancellous bone is the meshwork of spongy tissue (trabeculae) of mature adult bone typically found at the core of vertebral bones in the spine and the ends of the long bones (such as the femur or thigh bone).
The compact bone is the main structure in the body for support, protection, and movement. Due to the strong nature of compact bone, compared to spongy bone, it is the preferred tissue for strength. Spongy bone is used for more active functions of the bones, including blood cell production and ion exchange.
Compact bone (or cortical bone) forms the hard external layer of all bones and surrounds the medullary cavity, or bone marrow. It provides protection and strength to bones. Compact bone tissue consists of units called osteons or Haversian systems.
Bones vary in their proportions of compact and cancellous (spongy) bone; compact bone is dense and solid in appearance, whereas cancellous bone is characterized by open space partially filled with needle-like structures. Long bone examples are the femur , tibia and humerus.
