Question

what is an animal tissue

Answer 1

Animal Tissue Definition. ... In animal organs are made up of four basic types of tissues epithelial tissue, connective tissue, muscle tissue and nerve tissue. These tissues have distinctive features and specific functions which combine to form functioning organs.
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Answer 2

Answer:

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What is Animal Tissue ❓

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Animal Tissue

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.

A tissue is a group of connected cells that have a similar function within an organism. There are four basic types of tissue in the body of all animals, including the human body. These make up all the organs, structures and other contents of the body.

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.

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.

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.

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.

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