What is a concentric lamellae?

What is a concentric lamellae?

concentric lamellae – The thin cylindrical plates, or layers of bone matrix (produced by osteoblasts) around the minute vascular central canals in compact bone, which in cross-section produce a pattern of circles of different size, one within another, having a common center.

What is the function of the concentric lamellae?

the concentric lamellae (J) are arranged concentrically around longitudinal vascular channels to form the osteons (= cylindrical units of the compact bone tissue H); they have been colored to differentiate them easily from the two other types of lamellae.

What is lamella in anatomy?

In surface anatomy, a lamella is a thin plate-like structure, often one amongst many lamellae very close to one another, with open space between. Aside from respiratory organs, they appear in other biological roles including filter feeding and the traction surfaces of geckos.

Which type of bone tissue has concentric lamellae?

Compact bone

What are the 4 types of bone cells?

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].

What type of bone is arranged in concentric layers?

compact bone

What is end of bone called?

The end of the long bone is the epiphysis and the shaft is the diaphysis. The outside of the flat bone consists of a layer of connective tissue called the periosteum. The interior part of the long bone is the medullary cavity with the inner core of the bone cavity being composed of marrow.

Which layer is called the Diploe?

epiphyseal plate. composed of hyaline cartilage until the end of adolescence. epiphyseal plate. which layer is called the diploe. spongy bone in flat bone.

What is spongy bone called?

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

What is the function of trabecular bone?

Trabecular bone transfers mechanical loads from the articular surface to the cortical bone. The hydraulic properties absorb shock. The material properties of the bone compartments differ: trabecular bone has lower calcium content and more water content compared to cortical bone.

What are bone cavities called?

FMA. 83698. Anatomical terminology. The medullary cavity (medulla, innermost part) is the central cavity of bone shafts where red bone marrow and/or yellow bone marrow (adipose tissue) is stored; hence, the medullary cavity is also known as the marrow cavity.

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 four parts of an Osteon?

Terms in this set (6)

  • Haversian Canal. Central canal of the individual osteon.
  • Volksmann’s Canal. Canals that come off the Haversian canal and run horizontal.
  • Lacunae. Contains the osteocyte.
  • Osteocyte. Within the lacunae.
  • Lamella. Space between rows of lacunae.
  • Canaliculi. Spider legs that connect lacunae to one another.

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 5 structures make up an Osteon?

Bones, joints, cartilage, and ligaments. what are the five functions of the skeletal system?

Is an Osteon a cell?

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.

How do bones withstand tension and compression?

Bone is resistant to bending, twisting, compression and stretch. It is hard, because it is calcified, and the collagen fibres help the bone to resist tensile stresses. If you dissolve away the calcium salts of bone, then the bone becomes rubbery because of the collagen fibres which are left behind.

What are the major structures of the bone?

Bones consist of different types of tissue, including compact bone, spongy bone, bone marrow, and periosteum. All of these tissue types are shown in Figure below. Compact bone makes up the dense outer layer of bone. Its functional unit is the osteon.

Which type of bone is very hard and strong?

Compact bone is very hard and strong. Spongy bone is found inside bones and is lighter and less dense than compact bone.

What are the 4 main parts of a bone?

Most bones have 4 parts:

  • The outside part of bone is called the periosteum (say per-ee-oss-tee-um).
  • Compact bone is next.
  • Cancellous (say can-sel-us) bone comes next, and this looks a bit like a sponge but is much stronger.
  • On the very inside of many bones is the bone marrow.

What are the 4 main parts of the skeletal system?

The skeletal system is composed of four main fibrous and mineralized connective tissues : bones, ligaments, tendons, and joints.

What are the 4 Roles of the skeleton?

The skeletal system is the body system composed of bones and cartilage and performs the following critical functions for the human body:

  • supports the body.
  • facilitates movement.
  • protects internal organs.
  • produces blood cells.
  • stores and releases minerals and fat.

What is the most important part of skeletal system?

The axial skeleton contains 80 bones, including the skull, spine and rib cage. It forms the central structure of the skeleton, with the function of protecting the brain, spinal cord, heart and lungs.

How do we classify bones?

Bones can be classified according to their shapes. Long bones, such as the femur, are longer than they are wide. Short bones, such as the carpals, are approximately equal in length, width, and thickness. Flat bones are thin, but are often curved, such as the ribs.

What are the 2 types of bones?

Bones are made of two tissue types:

  • Compact bone: also known as cortical bone, this hard-outer layer is strong and dense.
  • Cancellous bone: also known as trabecular bone, this spongy inner layer network of trabeculae is lighter and less dense than cortical bone.

What are the two classifications of bones?

Classifications of Bones Bones are classified according to their shape.

  • Long Bones. A long bone is one that is cylindrical in shape, being longer than it is wide.
  • Short Bones. A short bone is one that is cube-like in shape, being approximately equal in length, width, and thickness.
  • Flat Bones.
  • Irregular Bones.

What are the 6 classifications of bones?

The bones of the human skeleton are classified by their shape: long bones, short bones, flat bones, sutural bones, sesamoid bones, and irregular bones (Figure 1).

Which bone is the longest and strongest bone in the human body?


What are the names of the 206 bones?

The human skeleton is made up of 206 bones, including bones of the:

  • Skull – including the jaw bone.
  • Spine – cervical, thoracic and lumbar vertebrae, sacrum and tailbone (coccyx)
  • Chest – ribs and breastbone (sternum)
  • Arms – shoulder blade (scapula), collar bone (clavicle), humerus, radius and ulna.

Why is it important to classify bones?

Why is it important to classify bones? ” Bones have different appearances and functions. Classifying them makes them easier to identify and treat conditions. ” 2. Aside from length, what are some other common characteristics of a long bone? Compare flat bones and long bones.


Andrey is a coach, sports writer and editor. He is mainly involved in weightlifting. He also edits and writes articles for the IronSet blog where he shares his experiences. Andrey knows everything from warm-up to hard workout.