Get chapter notes for CBSE Class 9 Science, chapter 6: Tissues (Part-II) that are prepared by subject experts. This tissue is present in stems, around vascular bundles, in the veins of leaves and in the hard covering of seeds and nuts. Name the […] Epithelial cells lie on a delicate non-cellular basement membrane which contains a special form of matrix protein, called collagen. They are long and narrow as the walls are thickened due to lignin, such cell walls are called lignified. They are living cells but their inner contents are similar to parenchyma cells. It also contains tubes just like xylem but does not perform mechanical function. 2. All right reserved. The cells of this tissue are living, elongated and irregularly thickened at the corner. Simple squamous, Stratified Squamous, Simple Cuboidal, Stratified Cuboidal, Simple Columnar, Stratified Columnar, Pseudostratified Columnar and Transitional epithelia or urothelium. Tissues Class 9 Extra Questions Science Chapter 6 Extra Questions for Class 9 Science Chapter 6 Tissues Tissues Class 9 Extra Questions Very Short Answer Questions Question 1. Cells of sclerenchyma are of two types: fibers and sclereids. It is also used for making sports goods, such as shuttle-cock, table tennis paddles, crcket balls, etc. Its matrix consists of two kinds fibers: white collagen fibers and yellow elastic fibers. Name any two types of simple permanent plant tissues. It is also concerned with body defense, fat storage, repair etc. A meristematic tissue constitutes a group of actively dividing cells present in the growing region of plant, e.g., the tips of roots and stems. The intercellular air spaces of parenchyma cells allow gaseous exchange. Vacuoles in these cells are either small or absent. Xylem parenchyma    4. The complex tissue consists of more than one type of cell having a common origin. The main functions of connective tissue are binding, supporting and packing together different organs of the body. It covers most organs and cavities within the body. Present in kidney tubules, salivary glands etc. You can use above books for extra knowledge and practicing different questions. When cells of collenchymas contain some chloroplasts, they manufacture sugar and starch. In collenchymas, intercellular spaces are generally absent. Types of animal Tissues in Class 9 biology tissue notes: There are four types of animal tissues: Epithelial tissues; Connective tissues; Muscular tissues; Nervous tissues; Epithelial tissues: Epithelium is the skin which protects our body from external environment. Animal tissues class 9 gives a detailed overview of the epithelial, connective, muscular and nervous tissues in human body. Sclerenchyma cells are dead cells and they are devoid of protoplasm. The function of cork in plant body is to provide protection. Overview. These cilia can move, and their movement pushes the mucus forward to clear it. Nerve supply from autonomous nervous system. The epidermis is usually made of a single layer of cells. They are made of white fibres. Cartilage are present at the joints of bones, in external ear (pinna), nose tip, epiglottis, trachea etc. The skin, which protects the body, is also made of squamous epithelium. These are present along the lateral side of the stems and roots. Present in the wall of alimentary canal, blood vessels, respiractory tract, urinary bladder etc. Sclereids are irregular shaped. Cartilage provides support and flexibility to the body parts. Connective tissue binds other tissues together in the organs. These are. These blood corpuscles and cells are: Red blood corpuscles (RBC) or erythrocytes, White blood corpuscles (WBC) or leucocytes. Given below are the links of some of the reference books for class 9 science. The cell wall is thin and encloses a dense cytoplasm which contains a small nucleus and a large central vacuole. Present in the lining of trachea, fallopian tube, nasal passage etc. This tissue is responsible for movement in our body. Companion cells are living parenchymarous cells lying on the sides of the sieve tubes. These are intercellular medium, connective tissue cells and fibers. Learn vocabulary, terms, and more with flashcards, games, and other study tools. DISCLOSURE: THIS PAGE MAY CONTAIN AFFILIATE LINKS, MEANING I GET A COMMISSION IF YOU DECIDE TO MAKE A PURCHASE THROUGH MY LINKS, AT NO COST TO YOU. They appear at the periphery of roots and stems when they grow older and increase in girth. The cells of this tissue are tightly packed and it forms continuous sheet. Epithelial cells often acquire additional specialisation as gland cells, which can secrete substances at the epithelial surface. In leaves, epidermis bears small pores called stomata. Question 1 What is a tissue? Functions, Xylem and Phloem - Videos, Examples Epithelial Tissue: Meaning & Types of Epithelial Tissue, Videos, Examples Permanent Tissues: Simple & Complex Permanent Tissue with Examples. The columnar (meaning ‘pillar-like’) epithelium facilitates movement across the epithelial barrier. The nervous tissue is responsible for the reception and transmission of information between different parts of the body. Tissues class 9 Notes. Helps in removing unwanted particles from trachea. The parenchyma stores food and helps in the sideway conduction of water. Tissues become organized to form organs and organs into organ systems. 2. The main function of parenchymatous tissue is storage of food, e.g., starch in the parenchyma of cortex of potato tuber. Note: Epithelial tissue may be simple, i.e., composed of a single layer of cells, or stratified, i.e., made up of several layers of cells. Phloem fibers. Types of epithelial tissue : 1. Quick summary with Stories. A single organ can have different types of epithelial tissue based on the substances to which different surfaces are exposed. The matrix may be jelly like, fluid, dense or rigid. Present in the inner surface of stomach, intestine, gall bladder etc. They are of 2 types: 1)Tendons:They are inelastic, cord like, strong structures that join muscle to bone. It is the chief component of ligaments and tendons. Class 9 Science Chapter 6 Extra Questions and Answers Tissues. It causes the organ (stem or root) to increase in diameter and girth. Sometimes a portion of the epithelial tissue folds inward and a multicellular gland is formed. Cuticle of epidermis also helps to reduce water loss by evaporation to prevent dessication. It is characterized by ordered and densely packed collection of fibers and cells. The adipose tissue is abundant below the skin, between the internal organs (e.g., around the kidney) in yellow bone marrow. Epithelial tissues help in absorption of water and nutrients. 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