A "drifting osteon" is classified as one that runs both longitudinally as well as transversely through the cortex. (b) The cardiac muscle cells are cylindrical, branched and uninucleate. (Answer is filled) Ans: Answer: KSEEB Solutions for Class 9 Science Chapter 6 Additional Questions. It is differentiated into two or three layers of lacunate collenchyma forming the hypodermis, large parenchyma cells and the starch sheath, made of barrel-shaped compactly-arranged cells with starch grains. These cells form a continuous layer. Fig. The vascular bundles of the leaf are enclosed in one or more layers of compactly arranged cells forming the bundle sheath. Epidermis is the outermost covering of the stem represented by a single layer of compactly arranged, barrel-shaped parenchyma cells. (ii) Cuticle – It covers the outside of the epidermis. Epidermis is usually singlelayered. Drifting osteons are a phenomenon that is not fully understood. give your regarding the force exerted by the contestants in pulling the truck and grocery goers in pullin The cells are compactly packed with little intercellular matrix. ʒ ən / (named for Clopton Havers) is the fundamental functional unit of much compact bone.Osteons are roughly cylindrical structures that are typically between 0.25 mm and 0.35 mm in diameter. Cells on the outside are cut off from this layer. Cells and fibres loosely arranged in a semi-fluid ground substance Fibres and fibroblasts are compactly packed ... Each muscle is made of many long, cylindrical fibres arranged in parallel arrays. 1, … The cells are compactly arranged without any intercellular spaces. Cells do not posses intercellular spaces. The collagen fiber density is lowest at the seams between lamellae, accounting for the distinctive microscopic appearance of a transverse section of osteons. Compact definition, joined or packed together; closely and firmly united; dense; solid: compact soil. There is usually a single layer of cells in the epidermis. a long cylindrical tube-like structure made up of many cells called vessel members, each with lignified walls and a large central cavity. crust and mantle b. mantle and outer corec. w is the onelectromagnetic wave related to its frequency, A spherical cloud of dust and gas that surrounds the nucleusof a comet, 4Name:Atomic No. Parenchyma has thin cell wall and spaces. Have you noticed how air is suddenly Stele. GalliumActivity 1.2 Electron Configuration, Open a bottle of soft drink. This is correct labelling. The major part of the cell cytoplasm was made up of large vacuole that frequently showed some lightly stained contents (Fig. Osteons are roughly cylindrical structures that are typically between 0.25 mm and 0.35 mm in diameter. In recent decades, osteohistological studies of dinosaur fossils have been used to address a number of issues, such as the periodicity of growth of dinosaurs and whether it was uniform across species and the question of whether dinosaurs were warm-blooded or not.. Cork is impervious to gases and water. Made of compactly arranged cylindrical cells, 2104Source Ded Modular ScancoCHECK YOUR UNDERSTANDING: Raad, analyze and answer the followingquestionsWhat is the speed of light across space?2. Each cell contains a dense cytoplasm and a prominent nucleus. They also have a chemical called suberin in the walls that makes them impervious to gases and water. They are several layers thick. III. ... * Presence of a hypodermis made … Vessel members ar e inter connected thr ough per forations in their common walls. The gastric glands in between the gastric are branched tubular glands compactly arranged and characterized by various types of cells Pyloric part Epithelium has got lots It is made up of loose of stomach of gastric pits lined by connective tissue columnar cells. The boundary of an osteon is the cement line. The cells of meristematic tissues are similar in structure and have thin and elastic primary cell wall made up of cellulose. Cells possess a chemical substance suberin in their walls. They are compactly arranged without inter-cellular spaces between them. Practising given Class 12 Biology Chapterwise Important Questions with solutions will help in scoring more marks in your Board Examinations. Muscle fibres contract (shorten) in response to stimulation, then relax (lengthen) and return to their uncontracted state in a coordinated fashion. See more. Diagram of compact bone from a transverse section of a long bone's cortex. It consists of pericycle, vascular bundles and pith. A push or pull that cause change in the motion of an object.A.  They are present in many bones of most mammals and some bird, reptile, and amphibian species. cylindrical cells placed one above the other in a single row. Hypodermis provides mechanical support and additional protection. When ... Ans. Thin walled living cells with cellulose cell wall and intercellular spaces, Collenchyma is present in leaf stalks below the epidermis, these cells are thickened at corners to reduce the intercellular spaces, making them compactly arranged. These cells form a continuous layer. There is usually a single layer of cells in the epidermis. Accele The haversian canal contains the bone's blood supplies. The presence of vessels is a characteristic feature of angiosperms. Sclerenchyma. Collagen fibers in a particular lamella run parallel to each other, but the orientation of collagen fibers within other lamellae is oblique. 2.2 Oscillatoria Dead cell Fig. The osteon or haversian system /həˈvɜːr.ʒən/ (named for Clopton Havers) is the fundamental functional unit of much compact bone. Cells of cork are dead and compactly arranged without intercellular spaces.  More research is needed, but osteohistology has the potential to positively affect the studies in bioarchaeology, paleontology and forensic investigations. Answer: KSEEB Solutions for Class 9 Science Chapter 6 Additional Questions Examinations! Or lamellae, of compact bone from a transverse section of osteons the compact bone a. A particular lamella run parallel to each other and the periosteum by oblique channels Volkmann. Plant leaves and stems that surrounds a vascular bundle concentric layers, or lacuna cells... System / h ə ˈ v ɜːr forations in their walls: epidermis: the outermost of... 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