• Skip to main content
  • Skip to secondary menu
  • Skip to primary sidebar
  • Skip to footer

CBSE Tuts

CBSE Maths notes, CBSE physics notes, CBSE chemistry notes

  • NCERT Solutions
    • NCERT Solutions for Class 12 English Flamingo and Vistas
    • NCERT Solutions for Class 11 English
    • NCERT Solutions for Class 11 Hindi
    • NCERT Solutions for Class 12 Hindi
    • NCERT Books Free Download
  • TS Grewal
    • TS Grewal Class 12 Accountancy Solutions
    • TS Grewal Class 11 Accountancy Solutions
  • CBSE Sample Papers
  • NCERT Exemplar Problems
  • English Grammar
    • Wordfeud Cheat
  • MCQ Questions

NEET Biology Notes Structural Organisation in Animals Animal Tissues

Structural Organisation in Animals Animal Tissues

 Tissues

A tissue is a group of similar cells specialised for performing of a common function. The term ‘Tissue’ was introduced by Bichat.
The branch of biological science which deals with the study of tissue is called Histology. Term ‘Histology’ was coined by Mayer (1819). Marcello Malpighi is known as founder of Histology.
Animal tissues are classified as epithelial (i.e. covers body surfaces, lines body cavities and forms glands), connective (i.e. protects and supports the body and its organs and binds organs together), muscular (i.e. responsible for movements) and nervous (i.e. initiates and transmits nerve impulses that coordinate body activities) tissues.

  • Epithelial Tissue

It covers the outer surface of all body organs and also lines the cavities of all hollow organs of body. Cells are compactly arranged and are held together by intercellular junctional complexes. Cells of the lower most layer rest on basement membrane. Depending upon the number of layers of cells, epithelial tissues are of two types, i.e. simple or unstratified and compound or stratified or multilaminar epithelial.

NEET Biology Notes Structural Organisation in Animals Animal Tissues 1

Some columnar or cuboidal cells get specialised for secretion are called glandular epithelium. They may be unicellular (e.g. goblet cells of alimentary canal) and multicellular
(e.g. salivary gland).

Based on the mode of pouring of their secretions, glands may be Exocrine (i.e. sefcretion releases through ducts or tubes) or endocrine (i.e. hormones secreted directly into blood).
In animal tissues, specialised junctions provide both structural and functional links between its individual cells.

Three types of junctions found in epithelium, which are given below:

  • Tight junctions which help to stop substances from leaking across a tissue.
  •  Adhering junctions perform cementing to keep neighbouring cells together.
  •  Gap junctions facilitate the cells to communicate with each other by connecting the cytoplasm of adjoining cells, for rapid transfer of ions, small molecules and sometimes big molecules.

 

  • Connective Tissue

Connective tissue is the most abundant and widely distributed tissue of the body. It is mesodermal in origin. It binds together the various tissues of an organ to support different parts of the body and involve in packaging around different organs.
Hertwig (1883) coined the word mesenchyma for the mesodermal tissue present between ectoderm and endoderm. Connective tissue constitutes about 30% of the body mass. It has both cellular and’extracellular components. Connective tissue plays important role in body defence, tissue repair, fat storage, transport, of materials, support and insulation, etc.
NEET Biology Notes Structural Organisation in Animals Animal Tissues 2

These are properties of some important connective tissues are described below:

  • Tendons and ligaments are dense connective tissues. Tendons attach skeletal muscles to bones, whereas ligaments attach one bone to another bone.
  • Bones have a hard and non-pliable ground substance rich in calcium salts and collagen fibres, which give bone its strength. The bone cells (osteocytes) present in the space called lacunae. The bone marrow in some bones is the site of production of blood cells.
  • Cartilage is a specialised connective tissue consists of cells called chondrocytes.

BiologyPhysicsChemistry

Primary Sidebar

NCERT Exemplar problems With Solutions CBSE Previous Year Questions with Solutoins CBSE Sample Papers
  • The Summer Of The Beautiful White Horse Answers
  • Job Application Letter class 12 Samples
  • Science Lab Manual Class 9
  • Letter to The Editor Class 12 Samples
  • Unseen Passage For Class 6 Answers
  • NCERT Solutions for Class 12 Hindi Core
  • Invitation and Replies Class 12 Examples
  • Advertisement Writing Class 11 Examples
  • Lab Manual Class 10 Science

Recent Posts

  • Understanding Diversity Question Answer Class 6 Social Science Civics Chapter 1 NCERT Solutions
  • Our Changing Earth Question Answer Class 7 Social Science Geography Chapter 3 NCERT Solutions
  • Inside Our Earth Question Answer Class 7 Social Science Geography Chapter 2 NCERT Solutions
  • Rulers and Buildings Question Answer Class 7 Social Science History Chapter 5 NCERT Solutions
  • On Equality Question Answer Class 7 Social Science Civics Chapter 1 NCERT Solutions
  • Role of the Government in Health Question Answer Class 7 Social Science Civics Chapter 2 NCERT Solutions
  • Vital Villages, Thriving Towns Question Answer Class 6 Social Science History Chapter 9 NCERT Solutions
  • New Empires and Kingdoms Question Answer Class 6 Social Science History Chapter 11 NCERT Solutions
  • The Delhi Sultans Question Answer Class 7 Social Science History Chapter 3 NCERT Solutions
  • The Mughal Empire Question Answer Class 7 Social Science History Chapter 4 NCERT Solutions
  • India: Climate Vegetation and Wildlife Question Answer Class 6 Social Science Geography Chapter 8 NCERT Solutions
  • Traders, Kings and Pilgrims Question Answer Class 6 Social Science History Chapter 10 NCERT Solutions
  • Environment Question Answer Class 7 Social Science Geography Chapter 1 NCERT Solutions
  • Understanding Advertising Question Answer Class 7 Social Science Civics Chapter 7 NCERT Solutions
  • The Making of Regional Cultures Question Answer Class 7 Social Science History Chapter 9 NCERT Solutions

Footer

Maths NCERT Solutions

NCERT Solutions for Class 12 Maths
NCERT Solutions for Class 11 Maths
NCERT Solutions for Class 10 Maths
NCERT Solutions for Class 9 Maths
NCERT Solutions for Class 8 Maths
NCERT Solutions for Class 7 Maths
NCERT Solutions for Class 6 Maths

SCIENCE NCERT SOLUTIONS

NCERT Solutions for Class 12 Physics
NCERT Solutions for Class 12 Chemistry
NCERT Solutions for Class 11 Physics
NCERT Solutions for Class 11 Chemistry
NCERT Solutions for Class 10 Science
NCERT Solutions for Class 9 Science
NCERT Solutions for Class 7 Science
MCQ Questions NCERT Solutions
CBSE Sample Papers
NCERT Exemplar Solutions LCM and GCF Calculator
TS Grewal Accountancy Class 12 Solutions
TS Grewal Accountancy Class 11 Solutions