What is fibrocartilage composed of?
What is fibrocartilage composed of?
Fibrocartilage contains large bundles of collagen fibres made up of Type I collagen. These bundles run linearly through the tissue separated by a cartilage matrix containing chondrocytes.
What is the gelatinous core of the intervertebral disc called?
The annulus fibrosus is the tough circular exterior of the intervertebral disc that surrounds the soft inner core, the nucleus pulposus. This outer portion is composed of a ring of ligament fibers that encases the inner core of the disc and securely connects the spinal vertebrae above and below the disc.
What type of cartilage are intervertebral discs made of?
hyaline cartilage
The intervertebral disk end plate comprises a thin layer of hyaline cartilage that is bonded to an underlying layer of perforated cortical bone. On the disk side, the hyaline cartilage blends in with the nucleus and annulus.
What is an intervertebral disc made up of?
The intervertebral disc is made up of two components: the annulus fibrosus and thenucleus pulposus. The annulus fibrosus is the outer portion of the disc. It is composed of layers of collagen and proteins, called lamellae.
What is the main function of fibrocartilage?
The triangular fibrocartilage complex functions as a major stabilizer of the distal radiocarpal articulation. It also acts as a shock absorber for the ulnocarpal articulation as well.
Why do cells in cartilage have to live in a lacuna?
They lie in spaces called lacunae with up to eight chondrocytes located in each. Chondrocytes rely on diffusion to obtain nutrients as, unlike bone, cartilage is avascular, meaning there are no vessels to carry blood to cartilage tissue. This lack of blood supply causes cartilage to heal very slowly compared with bone.
What is the main function of the intervertebral disk?
The intervertebral discs are fibrocartilaginous cushions serving as the spine’s shock absorbing system, which protect the vertebrae, brain, and other structures (i.e. nerves). The discs allow some vertebral motion: extension and flexion.
What kind of cartilage is in an intervertebral disc?
Intervertebral Discs. It consists of a thick outer ring of fibrous cartilage called the anulus (derived from the Latin word “anus” meaning ring) or annulus (anulus fibrosus disci intervertebralis), which surrounds an inner gel-like centre or more gelatinous core known as the nucleus pulposus (meaning “pulpy interior”).
Where does the notochord go in an intervertebral disc?
As development progresses, the notochord degenerates and disappears where it is surrounded by the developing vertebral bodies. Between the vertebrae, the notochord expands to form the gelatinous centre of the intervertebral disc – the nucleus pulposus. This nucleus is later surrounded by circularly arranged fibres that form the anulus fibrosus.
Which is part of the anulus forms the intervertebral disc?
The anulus fibrosus and nucleus pulposus together constitute the intervertebral disc. The anulus is made up of a series of 15-25 concentric rings, or lamellae, with the collagen fibres lying parallel within each lamella.
Are there any blood vessels in the intervertebral discs?
The intervertebral discs, like other cartilages, have no blood supply. They form the largest structures in the body without their own blood vessels. During embryonic development, and at birth, they possess some vascular supply which terminate in their endplates and anulus fibrosus.
Intervertebral Discs. It consists of a thick outer ring of fibrous cartilage called the anulus (derived from the Latin word “anus” meaning ring) or annulus (anulus fibrosus disci intervertebralis), which surrounds an inner gel-like centre or more gelatinous core known as the nucleus pulposus (meaning “pulpy interior”).
As development progresses, the notochord degenerates and disappears where it is surrounded by the developing vertebral bodies. Between the vertebrae, the notochord expands to form the gelatinous centre of the intervertebral disc – the nucleus pulposus. This nucleus is later surrounded by circularly arranged fibres that form the anulus fibrosus.
How are the vertebral disks separated from each other?
Intervertebral Disks. From the axis to the sacrum, the vertebral bodies are separated from each other by fibrocartilage called intervertebral disks. Each disk-shaped structure is made of a tough outer layer, the annulus fibrosus. The collagen fibers of this layer attach adjacent bod-ies of the vertebrae.
The intervertebral discs, like other cartilages, have no blood supply. They form the largest structures in the body without their own blood vessels. During embryonic development, and at birth, they possess some vascular supply which terminate in their endplates and anulus fibrosus.