GK SCIENTIST

General Knowledge One Stop Source
Menu
  • Home
  • Social Science
    • History
    • Political Science
    • Geography
  • Science
    • Physics
    • Chemistry
    • Biology
  • Chemistry Notes
  • Mathematics
  • Computer
  • Tutorial MySQL
  • Tutorial Python
  • Java Tutorial
  • English Grammar
  • English Essay
  • Indian Anthropology
  • Philosophy
  • Solved Paper
  • UPSC
  • Current Content
    • Current Affairs
    • RSTV News
    • Yojana and Kurukshetra Gist
  • Donate
  • Contact Us

If you are interested in advertising to our audience, submit the advertising enquiry form.

Advertising Enquiry
Biology Questions

Skeletal System

Gk Scientist November 22, 2020 No Comments
Tweet WhatsApp Telegram

Table of Contents

  • What is Skeletal System?
  • Types of Skeleton:
    • Exoskeleton:
    • Endoskeleton:
  • Functions of Skeletal System:

What is Skeletal System?

The hard parts of an animal body present inside or outside the body collectively form the skeletal system or Skeleton.

Types of Skeleton:

Skeleton is of two types- Exoskeleton and Endoskeleton.

Exoskeleton:

It is protective and supportive framework present outside the body. An exoskeleton is made up of hard structures or dead tissues. It is present in invertebrates as well as vertebrates.

Calcareous shells of Snails (Molluscs), Chitinous and sclerotized plate of insects (Arthropods) are examples of the exoskeleton in Invertebrates.

Scales (Dermal) in fishes, epidermal scales in reptiles, feathers, hairs, claws, nails, hoofs, horns in birds and mammals are the examples of the exoskeleton in Vertebrates.

These structures develop from the epidermis (except scales of fishes) of the skin. They are chemically formed of a non-living protein called Keratin (horn) protein. Of these only hairs and nails occur in man.

Endoskeleton:

It is the hard supportive structure which occurs inside the body of an organism. It is present in invertebrates as well as vertebrates.

In Vertebrates, endoskeleton is formed of bones and cartilages. These structures develop from the mesoderm and are living tissues.

Some Invertebrates such as corals and Echinodermata also have an endoskeleton. It is horny or calcareous.

Bones and Cartilages are specialized rigid connective tissues. Bones are the hardest components of endoskeleton as these have heavy deposits of calcium, magnesium and phosphorous in them. They have great tensile strength. Depending upon their formation, the bones are grouped into three categories- replacing (Cartilaginous) bones, membranous (dermal) bones and sesamoid bones.

Cartilages are softer than bones. Some vertebrates such as cartilaginous fishes have an exclusively cartilaginous endoskeleton. But most of the vertebrates, including man, have endoskeleton made primarily of bones, but some part of endoskeleton are cartilaginous also. The cartilages act as a shock absorber.

Functions of Skeletal System:

  • Support- The skeletal system forms a rigid framework, which gives support to the body against gravity. This is one of the main function of this system.
  • Shape- It gives and maintains a specific shape of the body.
  • Protection- It protects the delicate internal organs of the body. Example- Brain and spinal cord are protected within the cranium and vertebral column. Heart and lungs are protected by the thoracic cage. Eye and ears are protected by the skull.
  • Muscle Attachment- It provides a surface for the attachment of tendons of various skeletal muscles and ligaments.
  • Movements- Due to the contraction of the muscles, the bones or their parts are able to change their positions. These movements of bones bring out the movements of body parts and the organism.
  • Blood Cell Formation- Bone marrow inside the marrow cavity of a long bone (femur) act as a haemopoietic tissue and forms erythrocytes (RBCs) and granulated leucocytes (WBCs). This process is known as haemopoiesis.
  • Hearing- Bony ossicles in the middle ear help in hearing.
  • Breathing- Cartilages of the larynx and trachea and the ribs help in the process of breathing.
  • Sound Production- The cartilages of the larynx (cricoid, arytenoids and thyroid) help in sound production.
  • Acts as a reservoir- It stores minerals such as calcium and phosphate. Fat (Triglyceride) is stored in the yellow bone marrow in the form of adipose tissue and represents a source of stored energy for the body.
What is Excretion? Classify the animals on the basis of their excretory products
  • Asexual Reproduction- Types, Characteristics And Significance
  • Adrenal Cortex- Important Hormones And Deficiency Disorders
  • Functions of Bile Juice
  • Parthenogenesis: Types And Significance
  • Growth and Development in Plants
Prev Article
Next Article

Related Articles

Arboreal and Aerial Adaptation
Arboreal and Aerial Adaptation: The tree-dwelling is called arboreal habit …
Gk Scientist January 3, 2021 Science

Arboreal and Aerial Adaptation

Scalars and Vectors
Scalars and Vectors: In the study of physics, we come …
Gk Scientist January 6, 2021 Science

Scalars and Vectors

Sources of Light
Sources of Light: Light is defined as a form of …
Gk Scientist April 16, 2021 Science

Sources of Light

Nutrition in Microorganisms
Nutrition in Microorganisms: Microorganisms are the small unicellular or multicellular …
Gk Scientist April 5, 2021 Science

Nutrition in Microorganisms

General Science GK Part 4 For UPSC And NEET Exam
General Science GK Part 4 For UPSC And NEET Exam: …
Gk Scientist December 4, 2020 Science

General Science GK Part 4 For UPSC And NEET Exam

Daltons Law of Partial Pressures and Gay-Lussac’s Law
Daltons Law of Partial Pressures: Dalton (1801) observed that if …
Gk Scientist May 15, 2021 Science

Daltons Law of Partial Pressures and Gay-Lussac’s Law

Difference Between Physical and Chemical Adsorption
Physical and Chemical Adsorption: Property Physical Adsorption or Physisorption Chemical …
Gk Scientist June 19, 2021 Science

Difference Between Physical and Chemical Adsorption

What is vernalization in plants?
Vernalization in plants: It is defined as the low-temperature treatment …
Gk Scientist October 4, 2020 Science

What is vernalization in plants?

Leave a Reply Cancel Reply

Search




  • Popular
  • Recent




GK SCIENTIST

General Knowledge One Stop Source

Information

  • About Us
  • Terms and Condition, Disclaimer
  • Contact Us

Android Apps

  • IAS App For English Medium Students
  • IAS Basics App For English Medium Students
  • IAS Hindi App For Hindi Medium Students
DMCA.com Protection Status

Popular Tags

Biology (33) Biology Questions (88) Chemistry (57) Computer (215) Current Affairs (4) Current Content (0) Economy (10) English Essay (172) English Grammar (75) English Literature (10) Geography (83) History (259) Indian Anthropology (11) Indian Polity (14) JKAS Mains Question Papers (17) Mathematics (68) Moral Science (7) NCERT & Other Boards Books (25) Philosophy (114) Physics (89) Political Science (132) RS TV News (33) Science (553) Social Anthropology (7) Social Science (17) Solved Paper (47) UPSC (7) UPSC Mains Question Papers (26)

Downloads

  • NCERT Books
  • Old NCERT Books
  • NIOS Books For IAS, SSC, and State PSC Exam
  • Tamil Nadu Board Books: Important For UPSC, SSC, and State PSC Exam
  • Modern Indian and World History Notes For IAS Exam
  • UPSC Topper 2013 Gaurav Agrawal Notes For IAS Preparation
  • UPSC IAS Prelims General Studies – Previous Year Papers
  • UPSC Mains Question Papers

Copyright © 2023 GK SCIENTIST
Theme by MyThemeShop.com& Hosted On Cloudways

Ad Blocker Detected

Our website is made possible by displaying online advertisements to our visitors. Please consider supporting us by disabling your ad blocker.

Refresh
 

Loading Comments...