Question

Give the cartilage found in the epiglottis, nose tip, external ear, and vertebrae.

Answer 1

Cartilage is an elastic connective tissue that varies from the bone in a variety of respects. For one the main cell types are chondrocytes rather than osteocytes. Chondrocytes are the first chondroblast cells that create the extracellular collagen matrix (ECM) and are then trapped in the matrix. They lie in spaces called lacunae, with up to eight chondrocytes in each of them.

Complete answer:
Cartilage is a flexible connective tissue that varies from the bone in a variety of ways; it is avascular and its microarchitecture is less structured than the bone. Cartilage is not innervated and thus depends on the diffusion of nutrients. That causes it to heal very slowly.
The key types of cartilage cells are chondrocytes, the ground material is chondroitin sulfate, and the fibrous sheath is called perichondrium. There are mainly three types of cartilage: hyaline, fibrous, and elastic cartilage.
a. Hyaline cartilage: Hyaline cartilage is the most commonly used form and resembles glass. In the fetus, the bone starts as hyaline cartilage and then ossifies.
b. Fibrous cartilage: Fibrous cartilage has many collagen fibers and is found in intervertebral discs and pubic symphysis.
c. Elastic cartilage: Elastic cartilage is springy, yellow, and elastic and is located in the inner support. Hyaline cartilage is rich in collagen, a protein found not only in connective tissue but also in the skin and bones, which helps to keep the body together. Hyaline cartilage provides protection and flexibility for various parts of the body. It is located in structures such as the tip of the nose, the outer ears, and areas where the ends of the ribs are connected to the sternum, and in parts of the respiratory system such as the trachea and larynx, where it helps to shape these parts, but also gives them some flexibility.

Note: Though cartilage is very useful to the body, it has a drawback: it doesn't repair itself as well as most other tissues. Cartilage cells known as chondrocytes also do not replicate or rebuild themselves, which means that damaged or wounded cartilage is unable to heal well without medical intervention.