Terms in this set (10)Which term best describes compact bone? rigid.
Osteons are structural units of compact bone. Each osteon consists of a central canal, which contains nerve filaments and one or two blood vessels, surrounded by lamellae. Lacunae, small chambers containing osteocytes, are arranged concentrically around the central canal.
FMA. 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.
Spongy and
compact bones are two basic structural
bone types.
Spongy vs Compact Bones.
| Spongy Bones | Compact Bones |
|---|
| They are made up of trabeculae | They are made up of osteons |
| They fill the inner layer of most bones | They fill the outer layer of most bones |
| Bone-marrow cavity absent | Bone-marrow cavity present in the centre |
Compact bone forms the largest and strongest structure in the humerus, surrounding the trabeculae in the ends and the medullary cavity in the shaft. Finally, the ends of the humerus are capped by a thin layer of hyaline known as articular cartilage that acts as a shock absorber in the joints.
Compact bone is the denser, stronger of the two types of bone tissue ((Figure)). 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.
Both compact bone and spongy bones are structural bones. Both provide shape and structure to the organism. @. Both are osseous tissues.
Bone Introduction
| Question | Answer |
|---|
| Between osteons, you can find irregular patches of ______ ______- remains of old osteons that have broken down as the bone grew. | Interstitial Lamellae |
| Spongy bone consists of thin plates called _____, and rods and spines called ______? | Trabeculae and Spicules |
What differences between compact & spongy bone can be seen with the naked eye? Compact bone is very smooth, dense & thick. Spongy bone has a lot of open spaces.
The osteocytes are arranged in concentric rings of bone matrix called lamellae (little plates), and their processes run in interconnecting canaliculi. The central Haversian canal, and horizontal canals (perforating/Volkmann's) canals contain blood vessels and nerves from the periosteum.
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 bone is made up of compact bone, spongy bone, and bone marrow. Compact bone makes up the outer layer of the bone. Spongy bone is found mostly at the ends of bones and contains red marrow. Bone marrow is found in the center of most bones and has many blood vessels.
The bone matrix is that part of the bone tissue and forms most of the mass of the bone. It is comprised of organic and inorganic substances. The organic component of the bone matrix includes the collagen and ground substance whereas the inorganic component is the inorganic bone salts, mainly the hydroxyapatite.
The flat bones are: the occipital, parietal, frontal, nasal, lacrimal, vomer, hip bone (coxal bone), sternum, ribs, and scapulae. These bones are composed of two thin layers of compact bone enclosing between them a variable quantity of cancellous bone, which is the location of red bone marrow.
Bone is a mineralized connective tissue that exhibits four types of cells: osteoblasts, bone lining cells, osteocytes, and osteoclasts [1, 2]. Bone exerts important functions in the body, such as locomotion, support and protection of soft tissues, calcium and phosphate storage, and harboring of bone marrow [3, 4].
Cartilage is a type of firm, thick, slippery tissue that coats the ends of bones where they meet with other bones to form a joint. Cartilage acts as a protective cushion between bones.
Compact bone has more bone matrix and less space due to osteons. Spongy bones have less bone matrix and more space due to trabeculae.
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.
Why does compact bone have canaliculi, but spongy bone does not? Nutrients and wastes cannot diffuse through compact bone.
If you do not get enough calcium through your food or supplements, your body will take the calcium it needs from your bones. Necessary for calcium to be absorbed in the intestine. Allows for proper calcium and vitamin D regulation.
There is a different layer of connective tissue proper that lines all the internal cavities of bones – the central canals of osteons in compact bone, and the exterior surface of trabeculae in spongy bone – called the endosteum.
A tendon is a fibrous connective tissue which attaches muscle to bone. Tendons may also attach muscles to structures such as the eyeball.
