Question: What Is Spongy Bone For?

What is the spongy bone called?

Cancellous boneCancellous bone, also called trabecular bone or spongy bone, light, porous bone enclosing numerous large spaces that give a honeycombed or spongy appearance.

The bone matrix, or framework, is organized into a three-dimensional latticework of bony processes, called trabeculae, arranged along lines of stress..

Why do we need both compact and spongy bone?

They make up the long bones in the body….Spongy vs Compact Bones.Spongy BonesCompact BonesThey light, spongy and soft in natureThey are heavy, tough and compact in natureThey are made up of trabeculaeThey are made up of osteonsThey fill the inner layer of most bonesThey fill the outer layer of most bones4 more rows

What is the spongy bone filled with?

marrowSpongy Bone (Cancellous 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.

What is Osteon?

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 are the 5 main bone types?

There are five types of bones in the skeleton: flat, long, short, irregular, and sesamoid. Let’s go through each type and see examples.

What does spongy bone feel like?

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.

How is spongy bone formed?

Osteoblasts penetrate the disintegrating cartilage and replace it with spongy bone. This forms a primary ossification center. Ossification continues from this center toward the ends of the bones. After spongy bone is formed in the diaphysis, osteoclasts break down the newly formed bone to open up the medullary cavity.

What is inside an Osteon?

Osteons are cylindrical structures that contain a mineral matrix and living osteocytes connected by canaliculi, which transport blood. 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.

Where is Osteon found?

2 Structure of the osteon. Compact bone is found in the cylindrical shells of most long bones in vertebrates. It often contains osteons which consist of lamellae that are cylindrically wrapped around a central blood vessel (Haversian system or secondary osteon).

What covers the trabeculae of spongy bone?

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.

Is spongy bone stronger than compact bone?

Spongy bone is softer and weaker than compact bone, but is also more flexible.

What type of tissue is bone?

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].

How does spongy bone reduce weight?

Spongy bone is located where bones are not heavily stressed or where stresses arrive from many directions. Spongy bone is much lighter than compact bone, which helps reduce the weight of the skeleton and makes it easier for muscles to move the bones.

Is yellow marrow found in spongy 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. There are two types of bone marrow: red and yellow.