(d) It fixes skin to underlying muscles. Class 9 Science Chapter 6 Extra Questions and Answers Tissues. Xylem is composed of cells of four different types: 1. Which tissue forms a barrier to keep different body systems separate? Xylem is the water conducting element (transportation of water) which also provides mechanical strength to … Practice more on Tissues. Lignin is a chemical substance present in the cell wall of plants which acts as a chemical and hardens i. Cutin is a chemical substance with waterproof quality covering the aerial parts of plants. parenchyma… They are loosely packed and have large intercellular space (space between the cells). Collenchyma: Collenchyma is usually found in 3-4 layers beneath epidermis in stem, petioles and leaves of herbaceous dicot plants. Answer: Phloem is made up of four types of elements sieve tube, companion cells, phloem fibres and phloem parenchyma. Which blood cells deal with immune reaction? Chlorenchyma tissue is the parenchyma tissue modified to carry out … Class 9 Science Chapter 6 Extra Questions Answers are important for the preparation of school tests as well as final exams. Function of stomata: (a) Necessary for exchanging gases with the atmosphere during photosynthesis and respiration. (b) Intercellular spaces are absent in sclerenchymatous tissues. These are dead and thick walled cells. Copyright 2020 by Tiwari Academy – A step towards Free Education, NCERT Solutions for Class 9 Science Chapter 6, Class 9 Science Chapter 6 Important Questions. Science NCERT Grade 9, Chapter 6, Tissues deals with the important concepts of a cluster of cells which are responsible to carry out a specific function in the human body.The discussion of the topic begins … Tissues in tendrils of a climber plant and leaf stalk of a plant are examples of which tissue? The main function of the parenchyma cells of roots and stem is the storage of food and water. Permanent tissue are classified into the following two types: (i) Simple permanent tissue (ii) Complex permanent tissue Simple permanent tissues: These tissues are composed of cells which are structurally and functionally similar. In the respiratory tract, the columnar epithelial tissue also have move and their movement pushes the mucus forward to clear it. 4. Collenchyma are the chief mechanical tissue of the young parts of the plant. Stomata are small pores present in the epidermis of leaves and are enclosed by two kidney shaped cells called guard cell. (ii) Tissues are made up of dead cell. Blood occurs in blood vessels called arteries, veins and capillaries which are connected together to form the circulatory system. They also protect the body from viral or bacterial infections. Answer. Give the name of the connective tissue lacking fibres. The main function of the parenchyma cells of roots and stem is the storage of food and water. Page - 1 . (c) We get a crunchy and granular feeling when we chew pear fruit. Answer: Xylem and phloem are called as complex tissues as they are made up of more than one type of cells. Differentiate between sclerenchyma and parenchyma tissues. Where are the epithelial cells with cilia found. The characteristic of cork are as follows: (a) Cells of cork are dead at maturity. A parenchymatous tissue modifies into three major types, namely chlorenchyma, aerenchyma and prosenchyma. (iii) No intercellular spaces between the cell are found. We have received your request successfully. Neurons are highly specialized for being stimulated and then transmitting the stimulus very rapidly from one place to another within the body. Describe the types of connective tissues along with their functions. Animal tissues can be grouped into four basic types: epithelial, muscular, connective and nervous tissues. The girth of the stem or root increases due to lateral meristem. Why is the epidermis present as a thick waxy coating of cutin in desert plants? Hence we get the crunchy and granular feeling while chewing a pear. It is made up of four types of element: sieve tubes, companion cells, phloem fibres and the phloem parenchyma. Tissues Class 9 Extra Questions Very Short Answer Type. Parenchyma. (c) Cells do not posses intercellular spaces. (a) Simple squamous epithelium: They are present in cells lining blood vessels or lung alveoli where transportation of substances occurs through a selectively permeable surface, there is a simple flat kind of epithelium. •Fundamental tissue of the plant body •Shape: isodiametric or polygonal •Thin walled with prominent … The cells of parenchyma assimilate and store food. In aquatic plants, large air cavities are present in parenchyma. Xylem parenchyma … The cells of this tissue are living, elongated and irregularly thickened at the corner. Functions: (a) Tendons: Tendons are cord like, strong, inelastic structures that join skeletal muscles to bones. This tissue is “functional” – performing tasks such as photosynthesis in plants or storing information in the human brain – as opposed to “structural” tissues like wood in plants or bone in animals.. (b) Stratified squamous epithelium: Skin epithelial cells are arranged in many layers to prevent wear and tear. The parenchyma stores food and helps in the lateral conduction of water. What is the lining of kidney tubules made up of? Give reasons: (a) Meristematic cells have a prominent nucleus and dense cytoplasm but they lack vacuole. Being a poor conductor of heat, it reduces heat loss from body i.e. They movement of food in the alimentary canal or the contraction and relaxation of blood vessel are involuntary movements. And for the proper working of an organism many functions like food transport, immunity, strength etc., are needed to be performed properly. NCERT Solutions for Class 6 Social Science, NCERT Solutions for Class 7 Social Science, NCERT Solutions for Class 8 Social Science, NCERT Solutions for Class 9 Social Science, NCERT Solutions for Class 10 Social Science, NCERT Solutions for Class 11 Business Studies, NCERT Solutions for Class 11 Physical Education, NCERT Solutions for Class 12 Business Studies, NCERT Solutions for Class 12 Physical Education, CBSE Sample Papers for Class 10 Session 2020-2021, CBSE Sample Papers for Class 12 Session 2020-2021, Class 9 Science Chapter 6 Question Answer. Q. which of this function not belongs to parenchyma tissue? This allow them to transport water and minerals vertically upwards. It consist of tracheids, vessels, xylem parenchyma and xylem fibres. In that case, parenchyma carries out photosynthesis and is then termed as chlorenchyma. NCERT Class 9 Science Lab Manual – Plant and Animal Tissues EXPERIMENT Aim To identify parenchyma and sclerenchyma tissues in plants, striated muscle fibres and nerve cells in animals, … Explain. Sometimes, a portion of the epithelial tissue folds inward and multicellular gland is formed. The plants will die within few days of replanting it. (b) Lymph transports the nutrients (oxygen, glucose) that may have filtered out of the blood capillaries back into the heart to be recirculated in the body. Parenchyma is a term used to describe the functional tissues in plants and animals. Most of these tissue contain living protoplasm. Such a parenchyma type is called aerenchyma. Voluntary muscles are also called skeletal muscles because they are mostly attached to the bones and help in body movement. Describe the structural and function of different types of epithelial tissues. Most of these tissue such as xylem, phloem sclerenchyma and cork are dead tissue i.e. Plants and animals are two different types of organisms. Parenchyma mainly works are packing material in plant parts. In desert plants, how does the rate of loss of water get reduced? Xylem mainly consists of dead cells (except xylem parenchyma). (d) Branches of a tree move and bend freely in high wind velocity. Multiple Choice Questions. Sometimes a portion of the epithelial tissue folds inward and a multicellular gland is formed. What is the composition of the cartilage matrix? Why are xylem and phloem called complex tissues? Impulses are the passage of electrical activity along the axon of a nerve cell. Blood is a type of connective tissue. (iii) Adipose tissue: Adipose tissue is basically an aggression of fat cells. We cannot start or stop them from working by our desire. They are of two types: (a) Xylem - Xylem is a vascular and mechanical tissue which conducts water. As plants grow older a strip of secondary meristem replace the epidermis of the stem. They are parenchyma, collenchyma, and sclerenchyma. Classify permanent tissues and describe them. (c) Pear has sclerenchymatous stone cells which are granular in texture. Which structure protects the plant body against the invasion of parasites? They divide for the growth and reproduction of the plants. Xylem parenchyma is an element of complex tissue called “Xylem”.Parenchyma cells of xylem are mainly involved in the storage of carbohydrate, fats and water conduction. See Video Explanation Chapter 6 Tissues Part 1 The tissue consist of localised thickening in their cell walls. 1. Extra Questions for Class 9 Science Chapter 6 Tissues with Answers Solutions. Any organism will have a wide range of cell types. How are messages conveyed from one place to another within the body? 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