In this Science (Biology) video in Hindi we explained the structure and functions of muscular tissue and its types for class 9th. This is a topic of Chapter 6 of science from NCERT.
Animal tissues can broadly be categorized into four types, viz., epithelial tissue, connective tissue, muscular tissue and nervous tissue.
๐ด๐๐๐๐๐๐๐ ๐ป๐๐๐๐๐ โ It is composed of cells having the ability to contract and relax in order to produce movement of the body parts.
In other words, we call this tissue muscle.
Muscular tissue is composed of muscle cells. These cells have structures called myofibril and these myofibrils have two types of proteins called myocin and actin arranged in parallel fashion. When signal from the nervous system comes to this tissue, the proteins come closer and hence, the muscle cells contract.
Muscular tissue is broadly categorized into three types, viz., skeletal muscle, smooth muscle and cardiac muscle.
๐ด Skeletal muscle -
โ The cells of skeletal muscles are ๐๐๐๐, ๐๐ฆ๐๐๐๐๐๐๐๐๐, ๐ข๐๐๐๐๐๐โ๐๐ and ๐๐ข๐๐ก๐๐๐ข๐๐๐๐๐ก๐ (having many nuclei).
โ These muscles are mostly attached to bones and help in body movement. So they are called ๐ ๐๐๐๐๐ก๐๐ ๐๐ข๐ ๐๐๐๐ .
โ These are ๐ฃ๐๐๐ข๐๐ก๐๐๐ฆ ๐๐ข๐ ๐๐๐๐ .
โ Under the microscope, these muscles show alternate light and dark bands (๐ ๐ก๐๐๐๐ก๐๐๐๐ ) when stained appropriately. They are also called ๐ ๐ก๐๐๐๐ก๐๐ ๐๐ข๐ ๐๐๐๐ .
๐ด Smooth muscle -
โ Smooth muscles are ๐๐๐ฃ๐๐๐ข๐๐ก๐๐๐ฆ ๐๐ข๐ ๐๐๐๐ .
โ The cells are long with ๐๐๐๐๐ก๐๐ ๐๐๐๐ (spindle-shaped) and ๐ข๐๐๐๐ข๐๐๐๐๐ก๐ (having a single nucleus).
โ They are also called ๐ข๐๐ ๐ก๐๐๐๐ก๐๐ ๐๐ข๐ ๐๐๐๐ .
โ These muscles are found in ๐ ๐ก๐๐๐๐โ, ๐๐๐ก๐๐ ๐ก๐๐๐, ๐๐๐๐ , ๐ข๐๐๐ก๐๐๐ , ๐๐๐๐๐ ๐ฃ๐๐ ๐ ๐๐๐ etc.
๐ด Cardiac muscle -
โ Cardiac muscles are ๐๐๐ฃ๐๐๐ข๐๐ก๐๐๐ฆ ๐๐ข๐ ๐๐๐๐
โ These muscles show rhythmic contraction and relaxation throughout life.
โ These muscle cells are ๐๐ฆ๐๐๐๐๐๐๐๐๐, ๐๐๐๐๐โ๐๐, ๐ข๐๐๐๐ข๐๐๐๐๐ก๐ and ๐ ๐ก๐๐๐๐ก๐๐.
๐๐๐๐๐๐๐๐๐๐๐๐๐๐๐๐๐๐๐๐๐
๐ด Click here to watch the whole playlist on Chapter 6 : 'Tissues' for Class 9 :
โข Tissues || in Hindi fo...
๐๐๐๐๐๐๐๐๐๐๐๐๐๐๐๐๐๐๐๐๐
Previous videos -
๐ด Tissues (Introduction)
โข Tissues || in Hindi fo...
๐ด Meristematic Tissue
โข Meristematic Tissue ||...
๐ด Simple Permanent Tissue
โข Simple Permanent Tissu...
๐ด Epidermis
โข Epidermis || Plant Tis...
๐ด Complex Permanent Tissue
โข Complex Permanent Tiss...
๐ด Animal Tissues (Introduction)
โข Animal Tissues (Introd...
๐ด Epithelial Tissue and its Types
โข Epithelial Tissue and ...
๐ด Connective Tissue and its Types
โข Connective Tissue and ...
ะะตะณัะทะณั ะฑะตั Muscular Tissue || Animal Tissues (Part 4) || in Hindi for Class 9
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