Skeletal tissues - cartilage, Biology

Assignment Help:

SKELETAL TISSUES -

  1. These connective tissues form the endoskeleton of the vertebrates.
  2. These support the body, protect the various organs and help in locomotion.
  3. Skeletal tissues include cartilage and bone.

CARTILAGE -

  1. Cartilage is a soft skeletal tissue.
  2. It is not rigid like bone.
  3. It is found more abundantly in vertebrate embryoes because most of the bones forming skeleton of the adult are cartilaginous in the early stage.
  4. The cartilages are of three types.

(a) Hyaline cartilage

  1. It contains clear, large amount of translucent, slightly elastic matrix with less fibres.
  2. The matrix often has very fine white fibres which are difficult to observe.
  3. It forms articular surfaces at the joints of long bones, where it is called articular cartilage.
  4. It also forms part of larynx and sternum, rings of trachea and bronchi, sternal parts of ribs, hyoid apparatus and nasal cartilages.
  5. Most of the embryonic skeleton consists of hyaline cartilage.
  6. Hyaline cartilage forms the skeleton of elasmobranch fishes and the embryonic skeleton in bony vertebrates.

2338_fibro cartilage.png

(b) Fibrous cartilage -

  1. It has well developed fibres in the matrix.
  2. It is of two types -

(i)  White Fibrous Cartilage or White Fibrocartilage -

  1. The matrix is firm and has abundant white fibres.
  2. It occurs in the intervertebral discs where it acts as cushion and in the pubic symphysis where it helps in parturition.
  3. White fibrous cartilage is the strongest cartilage. (ii) Yellow Elastic Fibrocartilage -
  4. The matrix contains numerous yellow fibres.
  5. Due to the presence or yellow fibres, the cartilage becomes more flexible.
  6. This type of cartilage is found in the pinna and external auditory canal of the ear, Eustachian tubes, epiglottis and tip of the nose. It makes these organs flexible.

1064_hyaline cartilage.png

(c) Calcified cartilage -

  1. Sometimes matrix contains granules of calcium crabonate, then the cartilage is called calcified cartilage.
  2. Calcium carbonate makes the cartilage hard and inelastic.
  3. This cartilage is found in suprascapula of pectoral girdle of frog and vertebrae of shark.

Related Discussions:- Skeletal tissues - cartilage

Explain various chemical formulas, Explain various chemical formulas? C...

Explain various chemical formulas? Chemical Formulas A molecule can be represented in any of three ways: its chemical formula, structural formula, or Lewis diagram. A chemic

Advantage and disadvantage of steam sterilization, Q. Advantage and Disadva...

Q. Advantage and Disadvantage of steam sterilization? Advantage: most efficient and reliable sterilization method available. Its quite simple to operate and relatively inexpens

What are the chiasms of homologous chromosomes, What are the "chiasms" of h...

What are the "chiasms" of homologous chromosomes seen in prophase I? Chiasms are intersections of two tracts in the form of X. The chiasms seen in prophase I are chromosome

Management of diabetes, By now you know that diabetes cannot be cured but c...

By now you know that diabetes cannot be cured but can be treated so that an individual leads a normal life. Patients who maintain their blood glucose levels within the normal range

Microbodies, Microbodies Peroxisomes and glyoxysomes are microbodies fo...

Microbodies Peroxisomes and glyoxysomes are microbodies formed from ER which superficially resemble the lysosomes. Peroxisomes are spherical bodies limited by a single membrane

Why is a man’s voice usually lower than a woman’s voice, Q. Why is a man’s ...

Q. Why is a man’s voice usually lower than a woman’s voice? Pitch of the voice-how low or high it sounds-it depends on the length, tension and thickness of the vocal cords. As

Sexual reproduction, SEXUAL REPRODUCTION You must be aware that reproduct...

SEXUAL REPRODUCTION You must be aware that reproduction is one of the distinguishing features of living beings. Reproduction is basically of two types: asexual and sexual. In ase

Blotting, Blotting  is the technique for detecting one RNA within the mixtu...

Blotting  is the technique for detecting one RNA within the mixture of RNAs (a Northern blot) or one type of the DNA within of a mixture of DNAs (a Southern blot). A blot can prove

Apex locator in retreatment cases-endodontics principles, Apex locator in r...

Apex locator in retreatment cases: -    Electronic apex locators may give misread for working length when gutta-percha is initially being removed. -    Due to that file beging

Hybrid sterility, Hybrid sterility can be regarded as yet another form of i...

Hybrid sterility can be regarded as yet another form of interspecific sterility. The offspring of the interspecific crosses are mainly sterile. Geological studies have shown that t

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd