Youtor
Muscular Tissue Animal Tissues Part 4 in Hindi for Class 9
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=BiBH9WzeFkQ
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. • 𝑴𝒖𝒔𝒄𝒖𝒍𝒂𝒓 𝑻𝒊𝒔𝒔𝒖𝒆 − 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. • 🔴 Skeletal muscle - • → The cells of skeletal muscles are 𝑙𝑜𝑛𝑔, 𝑐𝑦𝑙𝑖𝑛𝑑𝑟𝑖𝑐𝑎𝑙, 𝑢𝑛𝑏𝑟𝑎𝑛𝑐ℎ𝑒𝑑 and 𝑚𝑢𝑙𝑡𝑖𝑛𝑢𝑐𝑙𝑒𝑎𝑡𝑒 (having many nuclei). • → These muscles are mostly attached to bones and help in body movement. So they are called 𝑠𝑘𝑒𝑙𝑒𝑡𝑎𝑙 𝑚𝑢𝑠𝑐𝑙𝑒𝑠. • → These are 𝑣𝑜𝑙𝑢𝑛𝑡𝑎𝑟𝑦 𝑚𝑢𝑠𝑐𝑙𝑒𝑠. • → Under the microscope, these muscles show alternate light and dark bands (𝑠𝑡𝑟𝑖𝑎𝑡𝑖𝑜𝑛𝑠) when stained appropriately. They are also called 𝑠𝑡𝑟𝑖𝑎𝑡𝑒𝑑 𝑚𝑢𝑠𝑐𝑙𝑒𝑠. • 🔴 Smooth muscle - • → Smooth muscles are 𝑖𝑛𝑣𝑜𝑙𝑢𝑛𝑡𝑎𝑟𝑦 𝑚𝑢𝑠𝑐𝑙𝑒𝑠. • → The cells are long with 𝑝𝑜𝑖𝑛𝑡𝑒𝑑 𝑒𝑛𝑑𝑠 (spindle-shaped) and 𝑢𝑛𝑖𝑛𝑢𝑐𝑙𝑒𝑎𝑡𝑒 (having a single nucleus). • → They are also called 𝑢𝑛𝑠𝑡𝑟𝑖𝑎𝑡𝑒𝑑 𝑚𝑢𝑠𝑐𝑙𝑒𝑠. • → These muscles are found in 𝑠𝑡𝑜𝑚𝑎𝑐ℎ, 𝑖𝑛𝑡𝑒𝑠𝑡𝑖𝑛𝑒, 𝑖𝑟𝑖𝑠, 𝑢𝑟𝑒𝑡𝑒𝑟𝑠, 𝑏𝑙𝑜𝑜𝑑 𝑣𝑒𝑠𝑠𝑒𝑙𝑠 etc. • 🔴 Cardiac muscle - • → Cardiac muscles are 𝑖𝑛𝑣𝑜𝑙𝑢𝑛𝑡𝑎𝑟𝑦 𝑚𝑢𝑠𝑐𝑙𝑒𝑠 • → These muscles show rhythmic contraction and relaxation throughout life. • → These muscle cells are 𝑐𝑦𝑙𝑖𝑛𝑑𝑟𝑖𝑐𝑎𝑙, 𝑏𝑟𝑎𝑛𝑐ℎ𝑒𝑑, 𝑢𝑛𝑖𝑛𝑢𝑐𝑙𝑒𝑎𝑡𝑒 and 𝑠𝑡𝑟𝑖𝑎𝑡𝑒𝑑. • 👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇 • 🔴 Click here to watch the whole playlist on Chapter 6 : 'Tissues' for Class 9 : • • Tissues || in Hindi for Class 9 • 👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇 • • Previous videos - • 🔴 Tissues (Introduction) • • Tissues || in Hindi for Class 9 • 🔴 Meristematic Tissue • • Meristematic Tissue || Plant Tissues ... • 🔴 Simple Permanent Tissue • • Simple Permanent Tissue || Plant Tiss... • 🔴 Epidermis • • Epidermis || Plant Tissues (Part 3) |... • 🔴 Complex Permanent Tissue • • Complex Permanent Tissue || Plant Tis... • 🔴 Animal Tissues (Introduction) • • Animal Tissues (Introduction) || Anim... • 🔴 Epithelial Tissue and its Types • • Epithelial Tissue and its Types || An... • 🔴 Connective Tissue and its Types • • Connective Tissue and its Types || An...
#############################
