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What is the function of the lamellae in bone?

What is the function of the lamellae in bone?

They are aligned parallel to the long axis of the bone. Each osteon consists of lamellae, which are layers of compact matrix that surround a central canal called the Haversian canal. Both types of lamellae are used to increase the amount of oxygen intake of the blood.

Does spongy bone have concentric lamellae?

Like compact bone, spongy bone, also known as cancellous bone, contains osteocytes housed in lacunae, but they are not arranged in concentric circles. Instead, the lacunae and osteocytes are found in a lattice-like network of matrix spikes called trabeculae (singular = trabecula) ((Figure)).

Where is lamellae bone?

Near the surface of the compact bone, the lamellae are arranged parallel to the surface; these are called circumferential lamellae. Some of the osteoblasts develop into osteocytes, each living within its own small space, or lacuna.

Is lamellar bone same as cortical bone?

Cortical bone consists of layers with vascular channels surrounded by lamellar bone. This arrangement is called the osteon or Haversian system.

Is lamellar bone the same as compact bone?

This immature bone is later replaced by secondary or lamellar bone (mature). Secondary bone is further classified as two types: trabecular bone (also called cancellous or spongy bone) and compact bone (also called dense or cortical bone).

What are concentric lamellae?

The concentric lamellae are like tubes of different size fitting inside each other to make an osteon. Running through the core of an osteons and along its axis is the central canal (= Haversian canal E) that contains blood vessels and nerves.

Where is the interstitial lamellae?

Interstitial lamellae of cortical bone found in the shafts of long bones are served by systems of canaliculi shaped like a broom. The handle of the broom is crowded by canaliculi which open into a transverse communication between the longitudinal vascular canals of osteons.

What is a 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 are the 3 types of lamellae in bone?

The other lamellae of compact bone are organized into inner circumferential, outer circumferential, and interstitial lamellae.

What is the interstitial lamellae?

Abstract. Interstitial lamellae of cortical bone found in the shafts of long bones are served by systems of canaliculi shaped like a broom. The handle of the broom is crowded by canaliculi which open into a transverse communication between the longitudinal vascular canals of osteons.

Is lamellar bone 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. Between the rings of matrix, the bone cells (osteocytes) are located in spaces called lacunae.