What is the structure of the 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.

In this manner, how is a compact bone formed?

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. Each osteon has many little spaces between its rings.

What is compact bone and how is it formed?

Compact bone, also called cortical bone, dense bone in which the bony matrix is solidly filled with organic ground substance and inorganic salts, leaving only tiny spaces (lacunae) that contain the osteocytes, or bone cells.

What does the compact bone consist of?

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.

What is the difference between compact and spongy bone?

1.Compact and spongy bones are the two main types of osseous tissues. 2.Compact bone is also called cortical bone while spongy bone is also called cancellous bone. 3.Compact bones are made of osteons while spongy bones are made of trabeculae.

What are your bones made out of?

Made mostly of collagen, bone is living, growing tissue. Collagen is a protein that provides a soft framework, and calcium phosphate is a mineral that adds strength and hardens the framework. This combination of collagen and calcium makes bone strong and flexible enough to withstand stress.

Is bone connective tissue?

Special connective tissue consists of reticular connective tissue, adipose tissue, cartilage, bone, and blood. Other kinds of connective tissues include fibrous, elastic, and lymphoid connective tissues.

Is red bone marrow found in spongy or compact bone?

Spongy bone is supplied by fewer and larger vessels than compact bone. These vessels perforate the outer compact layer and are distributed into the spongy portion of bone, which is filled with marrow. Bone marrow is tissue found in long bones, like the femur, that contains stem cells.

How do nutrients reach the osteocytes in compact bone?

When osteoblasts become trapped in the matrix that they secrete, they become osteocytes. Osteocytes are networked to each other via long cytoplasmic extensions that occupy tiny canals called canaliculi, which are used for exchange of nutrients and waste through gap junctions.

Is a bone a tissue?

Bone tissue (osseous tissue) is a hard tissue, a type of dense connective tissue. Bone tissue is a mineralized tissue of two types, cortical bone and cancellous bone. Other types of tissue found in bones include bone marrow, endosteum, periosteum, nerves, blood vessels and cartilage.

What is spongy bone made up of?

Spongy bone is a network of irregularly-shaped sheets and spikes of bone (trabeculae). The trabeculae are only a few cell layers thick. The spaces between the trabeculae contain red or yellow marrow, depending on a person’s age and on which bone it is. The marrow in these images is red marrow.

What is the bone forming cells called?

Before the organic matrix is mineralized, it is called the osteoid. Osteoblasts buried in the matrix are called osteocytes. During bone formation, the surface layer of osteoblasts consists of cuboidal cells, called active osteoblasts.

Which type of bone cell is responsible for making bone?

These old osteoblasts are also called LINING CELLS. They regulate passage of calcium into and out of the bone, and they respond to hormones by making special proteins that activate the osteoclasts. OSTEOCYTES are cells inside the bone. They also come from osteoblasts.

What holds the bones together?

Ligaments – a tough band of tissue that holds the ends of bones together at a joint Joints – where two or more bones meet together Tendons – cords of connective tissue that attach muscle to bone Muscles and tendons attach to bones on either side of a joint, holding the bone(s) together tightly In the human body, there

Are bones living or dead Why?

In fact, bones, like all other tissues in your body are alive. Because bones are the main support structure for us, they are made of a hard material that is mainly calcium. Throughout this hard substance, are blood vessels and nerves.

How does the structure of the bone make them both strong and lightweight?

They are also act as the main storage location for calcium an phosphate. 3b.) how does the structure of bones make them both strong an lightweight? makes it strong but lightweight because it is not uniformly solid. The hard outer layer is made up of compact bone, but the porous inside is made of spongy bone.

What type of tissue is a bone?

Bone tissue is a type of connective tissue that contains lots of calcium and phosphorous salts. About 25% of bone tissue is water, another 25% is made up of protein fibers like collagen. The other 50% of bone tissue is a mixture of mineral salts, primarily calcium and phosphorous.

What are the two major divisions of the human skeleton?

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.

Where are bone cells found in the body?

Each osteocyte is located in a space (lacuna) surrounded by bone tissue. Osteocytes maintain the mineral concentration of the matrix via the secretion of enzymes. As is the case with osteoblasts, osteocytes lack mitotic activity.

What are the bone cells?

There are two categories of bone cells. Osteoclasts are in the first category. They resorb (dissolve) the bone. The other category is the osteoblast family, which consists of osteoblasts that form bone, osteocytes that help maintain bone, and lining cells that cover the surface of the bone.

What organs do the skull and ribs protect?

Support : It provides a framework to support the organs and tissues of the body. 2. Protection: It protects our internal organs. The skull protects the brain; the thorax (sternum, ribs and spine) protects the heart, lungs and other viscera (organs within the thorax).

What is another name for cancellous bone?

Bone in which the spicules or trabeculae form a three-dimensional latticework (cancellus), with the interstices filled with embryonal connective tissue or bone marrow. Synonym(s): cancellous bone, spongy bone (1) , spongy substance, trabecular bone.

How does the structure of compact bone differ from that of the spongy bone?

How does spongy bone differ from compact bone? 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 .

What is spongy bone also known as?

spongy bone. n. Bone in which the spicules form a latticework, with interstices filled with embryonic connective tissue or bone marrow. cancellous bone spongy substance trabecular bone. Any of the turbinate bones.

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