What Is The Structure And Function Of Spongy Bone?

Spongy (cancellous) bone is lighter and less dense than compact bone. Spongy bone consists of plates (trabeculae)

and bars of bone adjacent to small, irregular cavities that contain red bone marrow

. The canaliculi connect to the adjacent cavities, instead of a central haversian canal, to receive their blood supply.

What is the functional structural unit of spongy bone?

The functional unit of spongy bone is

the trabecula

. This is a structure created by bone cells called osteocytes and the mineral matrix fixing them in…

What is the function of spongy bone?

Cancellous bone makes up about 20 percent of the human skeleton,

providing structural support and flexibility

without the weight of compact bone. It is found in most areas of bone that are not subject to great mechanical stress.

What is the function of compact and spongy bone?

What are three functions of spongy?

• Storage of Bone Marrow. Bone marrow, also called myeloid tissue, is formed when the trabecular matrix crowds blood vessels together and they condense. …
• Site of Erythropoiesis. …
• Reduces the Weight of the Skeleton. …
• Adds Strength and Flexibility to Bones. …
• Mineral Storage.

Which is the function of bone?

Bones: Bones of all shapes and sizes

support your body

, protect organs and tissues, store calcium and fat and produce blood cells.

What is haversian system?

Haversian canals are

a series of tubes around narrow channels formed by lamellae

. The Haversian canals surround blood vessels and nerve fibers throughout the bone and communicate with osteocytes. The canals and the surrounding lamellae are called a Haversian system (or an osteon).

What are 2 types of bone tissue?

There are two types of bone tissue:

compact and spongy

. The names imply that the two types differ in density, or how tightly the tissue is packed together. There are three types of cells that contribute to bone homeostasis.

What is the functional unit of a bone?

The osteon or haversian system

/həˈvɜːr. ʒən/ (named for Clopton Havers) is the fundamental functional unit of much compact bone.

What is a unit of bone called?

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 is the structure and function of compact bone?

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.

What is the primary function of compact bone?

Compact bone forms a shell around cancellous bone and is the primary component of the long bones of the arm and leg and other bones, where its

greater strength and rigidity are needed

.

What are the two types of bone marrow and their functions?

Bone marrow is found in the bones throughout your body. There are two types of bone marrow. Red bone marrow is involved in production of blood cells,

while yellow marrow is important for fat storage

. As you age, yellow bone marrow replaces red bone marrow.

What is the function of trabeculae?

The general functional role of trabecular bone is

to provide strength and transfer external load away from the joint and toward the cortical bone

(Currey, 2002; Barak et al. 2008).

What is the function of Diaphysis?

-Main shaft of longbone; hollow, cylindrical shape, thick, compact bone. Function:

Provide strong support without cumbersome weight

. -Both ends of long bone made of cancellous bone filled with red marrow.

How is spongy bone formed?

Osteoblasts secrete the extracellular matrix and deposit calcium, which hardens the matrix.

The non-mineralized portion of the bone or osteoid continues to form around blood vessels

, forming spongy bone.