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

What are the main structures of the human eye, What are the main structures...

What are the main structures of the human eye? The major structures of the human eye are the cornea, the iris, the pupil, the ciliary muscles, the crystalline lens and the ret

What do you mean by alzheimer''s disease, Q. What is Alzheimer's disease? ...

Q. What is Alzheimer's disease? The Alzheimer's disease is a degenerative disease of the central nervous system in which the patient has progressive dementia and alteration of

Define composition of the diet during pregnancy period, Define composition ...

Define composition of the diet during pregnancy period? The composition of the diet during pregnancy should be the same as for a non- pregnant woman; hence the contribution to

Drinking & driving, DRINKING & DRIVING - It should not be mixed because...

DRINKING & DRIVING - It should not be mixed because alcohol - 1.       Impairs ability to judge distances. 2.       Reduces capacity to coordinate limb muscles. 3.

Calcium control of glycogen metabolism, As we have seen, in during epinephr...

As we have seen, in during epinephrine hormonal control or glucagon, dephosphorylated   phosphorylase   kinase   is activated by being phosphorylated by protein kinase. This then a

How is the nervous system characterized, Q. How is the nervous system chara...

Q. How is the nervous system characterized in beings of the phylum Annelida? How can one compare cephalization in annelids to cephalization in platyhelminthes and nematodes? An

Cell theory, Cell theory is one of the four (or five) unifying concepts in...

Cell theory is one of the four (or five) unifying concepts in the biology. The cell theory states that all the living things are composed of at least one cell and that cell is the

What is dengue, What is dengue? Dengue, or dengue fever, is an epidemic...

What is dengue? Dengue, or dengue fever, is an epidemic disease in some countries (for instance, in Brazil), and its most dangerous form is hemorrhagic dengue. It is caused by

Explain the nutritional and functional role of zinc, Minerals  :-  Zinc ...

Minerals  :-  Zinc Food Source      Meats, cereals.  Nutritional Functional role Essential nutrient: Deficiency produces loss of appetite, growth retardation, skin

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