Write the short notes of animal tissue
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The animal cells are grouped together to form animal tissues. These tissues vary in their structure, function, and origin.The animal tissues are divided into epithelial, connective, muscular and nervous tissues. Let us have a glimpse of each type of animal tissue in detail.
animal tissue types
Types of Animal Tissue
The different types of animal tissues include:
Epithelial Tissue
Epithelial tissues form the protective covering and inner lining of the body and organs. These tissues were the first to evolve during evolution and were first formed during embryonic development. They develop from the ectoderm, mesoderm and endoderm of the embryo.
Characteristics of Epithelial Tissues
Following are the important characteristics of epithelial tissues:
These can be single-layered or multi-layered.
The tissues have the power to regenerate.
These are held together by gap junctions, tight junctions, zonula adheren, desmosomes, or interdigitation.
The plasma membrane of these cells is specialized into flagella, cilia, and microvilli.
Classification of Epithelial Tissues
The epithelial tissues can be classified as:
Classification
Function
Sensory epithelium
To perceive stimuli
Glandular epithelium
Secretes chemicals
Pigmented epithelium
Imparts colour in retina
Absorptive epithelium
For absorp
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BiologyBiology ArticleAnimal Tissue Types
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Animal Tissue - Types, Structure
The animal cells are grouped together to form animal tissues. These tissues vary in their structure, function, and origin.The animal tissues are divided into epithelial, connective, muscular and nervous tissues. Let us have a glimpse of each type of animal tissue in detail.
animal tissue types
Types of Animal Tissue
The different types of animal tissues include:
Epithelial Tissue
Epithelial tissues form the protective covering and inner lining of the body and organs. These tissues were the first to evolve during evolution and were first formed during embryonic development. They develop from the ectoderm, mesoderm and endoderm of the embryo.
Characteristics of Epithelial Tissues
Following are the important characteristics of epithelial tissues:
These can be single-layered or multi-layered.
The tissues have the power to regenerate.
These are held together by gap junctions, tight junctions, zonula adheren, desmosomes, or interdigitation.
The plasma membrane of these cells is specialized into flagella, cilia, and microvilli.
Classification of Epithelial Tissues
The epithelial tissues can be classified as:
Classification
Function
Sensory epithelium
To perceive stimuli
Glandular epithelium
Secretes chemicals
Pigmented epithelium
Imparts colour in retina
Absorptive epithelium
For absorption
Also Read: Plant Tissue System
Connective Tissue
Connective tissues develop from the mesodermal cells of the embryo. they support and bind other tissues in the body. These are made up of three components:
Intercellular Matrix: It is made up of mucopolysaccharide, specifically hyaluronic acid.
Cells: The major cells include fibroblasts, adipocytes, plasma cells and mast cells.
Fibres: Connective tissues are made up of three types of fibres, namely, collagen fibre, elastic fibre, reticular fibre.
The connective tissues perform the following functions:
They attach organs and tissues together.
They store fat in the form of adipose tissues.
They help in repairing tissues.
They prevent the organs from mechanical shocks.
The organs also help in defence.
Classification of Connective Tissues
The connective tissues are classified as follows:
Classification
Function
Connective Tissue Proper
Provides support and protection to the body
Vascular Tissue
Transport of materials in the body
Skeletal Tissue
It supports the body and gives it proper shape and form
Also Read: Epithelial and Connective Tissue
Muscular Tissue
The muscular tissue develops from the mesoderm of the embryo. It is classified into three types:
Cardiac
Smooth
Skeletal
Muscular tissue performs the following functions:
It helps in movement and locomotion.
It supports the bones and other structures.
It is responsible for peristalsis and parturition.
Classification of Muscular Tissue
The muscular tissue can be classified as:
Classification
Function
Cardiac
It helps in blood circulation and keeps the heart pumping
Smooth
These help in peristalsis and other involuntary functions of the body.
Skeletal
Provide support, help in movement and maintain homeostasis
Also Read: Muscular Tissue
Nervous Tissue
Nervous tissue makes up the peripheral and the central nervous system. It develops from the ectoderm of the embryo. It possesses the ability to initiate and transmit the nerve impulse. Its main components include:
Neurons – These are the structural and functional unit of nervous system. It comprises an axon, cell body and dendrites.
Neuroglia – These are special cells found in the brain and spinal cord. They provide support to the neurons and fibres.
Neurosecretory Cells – These function as endocrine organs. They release chemical from the axons direcly into blood.
Animal tissues class 9 gives a detailed overview of the epithelial, connective, muscular and nervous tissues in human body. Stay tuned with BYJU’S to know more about the animal tissues, its types or other related topics.
Further Reading:
Nervous Tissue
Tissues
Skeletal Muscle