Are osteocytes found in spongy bone?

Spongy bone is composed of trabeculae that contain the osteocytes. Red marrow fills the spaces in some bones.

Is Osteocyte in spongy bone?

Spongy bone is composed of cells called osteocytes that sit in small cavities known as lacunae. The lacunae and their accompanying osteocytes are housed in the trabeculae matrix of the bone along with the bone marrow.

What is only found in spongy 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.

Where are osteocytes found in?

lacuna

osteocyte, a cell that lies within the substance of fully formed bone. It occupies a small chamber called a lacuna, which is contained in the calcified matrix of bone. Osteocytes derive from osteoblasts, or bone-forming cells, and are essentially osteoblasts surrounded by the products they secreted.

Are there osteoblasts in spongy bone?

Spongy bone tissue is composed of trabeculae and forms the inner part of all bones. Four types of cells compose bony tissue: osteocytes, osteoclasts, osteoprogenitor cells, and osteoblasts.

Is spongy bone found in the diaphysis?

The central tubular region of the bone, called the diaphysis, flares outward near the end to form the metaphysis, which contains a largely cancellous, or spongy, interior. At the end of the bone is the epiphysis, which in young people is separated from the metaphysis by the physis, or growth plate.

Does spongy bone contain osteocytes and lacunae?

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 7).

Why are osteocytes spread out in bone tissue?

Why are osteocytes spread out in bone tissue? They develop from mesenchymal cells. They are surrounded by osteoid. They travel through the capillaries.

What chambers are osteocytes in?

The tiny chambers where osteocytes are found is called the lacuna.

What structure connects to osteocytes?

canaliculi

The bone matrix is composed of cells called osteocytes that form rings. The cells are connected by tiny canals called canaliculi.

How do osteocytes in dense bone get nutrients in and wastes out?

Osteocytes receive nutrients and eliminate wastes through blood vessels in the compact bone. Blood vessels in the periosteum and endosteum supply blood to blood vessels in the central canals. Nutrients leave the blood vessels of the central canals and diffuse to the osteocytes through the canaliculi.

What are the rings formed by the osteocytes called?

The osteocytes are arranged in concentric rings of bone matrix called lamellae (little plates), and their processes run in interconnecting canaliculi.

What is trabeculae in spongy bone?

Trabeculae are the thin columns and plates of bone that create a spongy structure in a cancellous bone, which is located at the ends of long bones and in the pelvis, ribs, skull, and vertebrae.

What are Osteons?

Osteons are formations characteristic of mature bone and take shape during the process of bone remodeling, or renewal. New bone may also take this structure as it forms, in which case the structure is called a primary osteon.

Is spongy bone soft?

Though spongy bone may remind you of a kitchen sponge, this bone is quite solid and hard, and is not squishy at all. The inside of your bones are filled with a soft tissue called marrow. There are two types of bone marrow: red and yellow.

What’s the membrane lining the diaphysis called?

Located in the main shaft of a long bone (diaphysis) (consisting mostly of compact bone), the medullary cavity has walls composed of spongy bone (cancellous bone) and is lined with a thin, vascular membrane (endosteum).

What structures make up spongy bone?

8 – Diagram of Spongy Bone: Spongy bone is composed of trabeculae that contain the osteocytes. Red marrow fills the spaces in some bones.

What is are found in compact bone but not spongy 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.