Class 9 Science Chapter 6 Extra Questions and Answers Tissues. Simple (made of one type of cell) or complex (made of more than one type of cells). The function of epidermis is the protection of plant from injury and infection. They also provide mechanical strength to the plants. Connective tissue also provides the structural framework and mechanical support to different tissues. Protects the underlying parts of the body from mechanical injury. Helps in removing unwanted particles from trachea. It has great strength but its flexibility is limited. Dendrons further branched out to form dendrites. Stomata are tiny pores that are mainly present on the surface of leaves. There is only a single type of chloroplast inC 3 i.e. In collenchymas, intercellular spaces are generally absent. The function of cork in plant body is to provide protection. Get NCERT Solutions for CBSE Class VII Science, Chapter 11 - Transportation in Animals and Plants. It is called chlorenchyma if it contains chlorophyll and performs photos ynthesis. Since walls of tracheids, vessels and sclerenchyma of xylem are lignified, they give mechanical strength to the plant body. All the cells of xylem except the xylem parenchyma are dead. Cells are usually loosely pac ked with large intercellular spaces. These ncert book chapter wise questions and answers are very helpful for CBSE exam. It is a type of parenchyma which contains chlorophyll. Epithelial cells protect the underlying cells from mechanical and chemical injuries and bacterial or viral infection. The skin and lining of buccal cavity, blood vessels, alveoli of lungs and kidney tubules are made of epithelial tissue. Cartilage provides support and flexibility to the body parts. The tissue organisation is comparatively simple. NCERT Solutions Class 9 Science Tissues . In leaves, epidermis bears small pores called stomata. It helps to provide buoyancy to the plants. The tissue is defined as a group of cells which are similar in structure and work together to perform a particular function is known as tissue. Phloem parenchyma   4. MCQ Questions for Class 7 Science with Answers are prepared as per the Latest Exam Pattern. Sclereids are irregular shaped. We are providing NCERT Solutions for Class 9 … They do not provide mechanical strength to the plants. Parenchyma forms the bulk of plant body. It is also concerned with body defense, fat storage, repair etc. NCERT Solutions for Class 9 Science Tissues part 2 Class 9 Science book solutions are available in PDF format for free download. Cartilage is always solid. Complex tissues are of two types: Xylem or wood and phloem or bast. Unstriated muscle fibres: Present in iris of the eye, ureters, blood vessels, alimentary canal and bronchi of lungs. Question 3. This tissue is present in stems, around vascular bundles, in the veins of leaves and in the hard covering of seeds and nuts. While in C 3 plants, there is no special type of leaf anatomy. They are highly specialised for transmitting the stimulus from one place to another within the body on being stimulated. Class 9 Science Chapter 6 Extra Questions Answers are important for the preparation of school tests as well as final exams. This tissue provides strength to the plants and is present in stems, around vascular bundles, in the veins of leaves and in the hard covering of seeds and nuts. The inner wall of each of the guard cells, towards … Tissues Class 9 NCERT Solutions have been explained in a simple and easy to understand manner. ... NCERT Solutions for Class 9 Science Maths Hindi English Math ; Formation of tissues has brought about division of labour in multicellular organisms. The sclerenchyma is mainly mechanical and protective in function. Companion cells are living parenchymarous cells lying on the sides of the sieve tubes. It is present in the aquatic plants, example in their floating leaves. Epithelial cells lie on a delicate non-cellular basement membrane which contains a special form of matrix protein, called collagen. The nervous tissue is responsible for the reception and transmission of information between different parts of the body. This process is known as transpiration. On the basis of their location, structure and function, there are following three types of muscle fibers: Striated muscles (stripped, skeletal or voluntary muscles), Smooth muscles (unstriated, visceral or involuntary muscles). Workload of individual cell ahs decreased due to origin of tissues. It consists of tall cells with cytoplasmic hair like cilia at free ends. Transpiration and exchange of gases are regulated by stomata. Cells possess a chemical substance suberin in their walls. They are tubular structures having a hollow lumen and composed of dead cells. Opening or closing of stomata are small pores called stomata round and flat nucleus plant (,! 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