What is meant by articular surface?

Definition. The surface of a joint at which the ends of the bones meet. Supplement.

What is the articular surface made of?

cartilage The articular surface is made up of two, strong, C-shaped layers. It is distinguished from other synovial joints by the unusual articulation of two different types of cartilage.

What is the function of articular surfaces?

Articular cartilage is a thin layer of specialized connective tissue with unique viscoelastic properties. Its principal function is to provide a smooth, lubricated surface for low friction articulation and to facilitate the transmission of loads to the underlying subchondral bone.

Where is the articular surface located?

any surface of a skeletal formation (bone, cartilage) that makes normal direct contact with another skeletal structure as part of a synovial joint; bony articular surfaces are usually covered with articular cartilage.

What is the articular surface of femur?

Articular surface Its front part is named the patellar surface and articulates with the patella; it presents a median groove which extends downward to the intercondyloid fossa and two convexities, the lateral of which is broader, more prominent, and extends farther upward than the medial.

What is the meaning of articular bone?

Two or more bones which are connected with each other via a joint.

What are the articular surfaces of the joints?

A joint or articulation (or articular surface) is the connection made between bones in the body which link the skeletal system into a functional whole. They are constructed to allow for different degrees and types of movement.

Is the acetabulum an articular surface?

The acetabulum has a ‘C’-shaped articular surface (Fig. 6.50), the lunate surface, which is lined by hyaline cartilage. … The deeper part of the acetabulum is non-articular and is occupied by the Haversian pad of fat. The head of the femur is mostly covered by articular cartilage (hyaline).

How is articular cartilage formed?

Cartilage is formed from the mesoderm germ layer by the process known as chondrogenesis. Mesenchyme differentiates into chondroblasts which are the cells that secrete the major components of the extracellular matrix. The most important of these components for cartilage formation being aggrecan and type II collagen.

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What is the purpose of articular cartilage?

Articular cartilage is the smooth, white tissue that covers the ends of bones where they come together to form joints. Healthy cartilage in our joints makes it easier to move. It allows the bones to glide over each other with very little friction.

Can we live without articular cartilage?

If there was no articular cartilage the bone surfaces would rapidly wear away due the friction that occurs when bone rubs against bone. Articular cartilage is self-lubricating because of its high fluid content which gives it the lowest coefficient of friction of any natural or man-made material.

What is the difference between articular cartilage and fibrocartilage?

Cartilages are a type of connective tissue that is made up of chondrocytes and an extracellular matrix. … The main difference between fibrocartilage and hyaline cartilage is that fibrocartilage is stiff and contains many collagen fibers whereas hyaline cartilage is a soft cartilage that contains fewer fibers.

What is a articular?

articular. / (ɑːˈtɪkjʊlə) / adjective. of or relating to joints or to the structural components in a joint.

What is articular surface of knee?

Articular Cartilage of the Knee Articular cartilage covers the surfaces of the bones where they meet: at the bottom of the femur, the top of the tibia, and the back of the kneecap. Articular cartilage is an extremely slippery, strong, flexible material.

What is an articular process?

The articular processes or zygapophyses (Greek ζυγον = yoke (because it links two vertebrae) + απο = away + φυσις = process) of a vertebra are projections of the vertebra that serve the purpose of fitting with an adjacent vertebra. The actual region of contact is called the articular facet.

What is linea aspera?

The linea aspera is the rough, longitudinal, irregular crest on the posterior surface of the shaft of the femur. It is formed by the joining of lateral and medial lips, which may be separated by up to 10 mm [1]. It is divided distally into medial and lateral supracondylar ridges.

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What’s the hardest bone in your body?

There are 22 bones in the human skull. The hardest bone in the human body is the jawbone.

What is the hardest bone in your body to break?

femur The thigh bone is called a femur and not only is it the strongest bone in the body, it is also the longest. Because the femur is so strong, it takes a large force to break or fracture it – usually a car accident or a fall from high up.

What is non articular surface?

Medical Definition of nonarticular : affecting or involving soft tissues (as muscles and connective tissues) rather than joints nonarticular rheumatic disorders.

What is a articular capsule?

The articular capsules form complete envelopes for the freely movable joints. Each capsule consists of two strata—an external (stratum fibrosum) composed of white fibrous tissue, and an internal (stratum synoviale) which is a secreting layer, and is usually described separately as the synovial membrane.

What forms the inferior articular surface?

Anatomical Parts The inferior articular surfaces (inferior articular facets) are circular in form, flattened or slightly convex and directed downward and medialward, articulating with the axis, and permitting the rotatory movements of the head.

What forms the superior articular surface?

The superior articular surface (superior facet)s are of large size, oval, concave, and approach each other in front, but diverge behind: they are directed upward, medialward, and a little backward, each forming a cup for the corresponding condyle of the occipital bone, and are admirably adapted to the nodding movements …

Which of the following articular surfaces form the Tarsometatarsal joints?

The metatarsals form articulations with some of the tarsal bones of the foot to form the tarsometatarsal joints. The first metatarsal articulates with the medial cuneiform, the second with the intermediate cuneiform and the third metatarsal articulates with the lateral cuneiform.

Which bones have ac shape?

The acromioclavicular, or AC, joint is a joint in the shoulder where two bones meet. One of these bones is the collarbone, or clavicle. The second bone is actually part of the shoulder blade (scapula), which is the big bone behind the shoulder that also forms part of the shoulder joint.

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Where is the ischium?

hip bone The ischium forms the posteroinferior part of the hip bone. Much like the pubis, it is composed of a body, an inferior ramus and superior ramus. The inferior ischial ramus combines with the inferior pubic ramus forming the ischiopubic ramus, which encloses part of the obturator foramen.

Where is tibiofemoral joint?

Brief Anatomy of the Knee[edit | edit source] The tibiofemoral joint is where the femur meets the tibia. It includes intra-articular structures such as the menisci and cruciate ligaments (ACL and PCL) and extracapsular structure such as the collateral ligaments (MCL and LCL).

Where are articular cartilage found?

In a joint, hyaline cartilage is referred to as articular cartilage. This is because the cartilage covers bones’ surfaces where they articulate, or meet to form the joint. For example, at the knee joint, the top of the tibia, the bottom of the femur, and the back of the kneecap are covered with articular cartilage.

Where is articular cartilage located specifically?

Articular cartilage is found only in diarthroidal joints (synovial joints), and is comprised of hyaline cartilage – a particularly smooth type of cartilage which allows for easy articulation, increased weight distribution, and shock absorption.

What is lubrication of articular cartilage?

Cartilage Friction and Osteoarthritis. … When in health, the articular cartilage (see Figure 1 for a schematic) is a self-lubricating, self-healing system, actively maintaining the lubrication between the opposing sliding surfaces of the joints over their lifetime.