pls answer these questions and in points of possible.Warning: no irrelevant answes
Answers
Explanation:
12. The musculoskeletal system is made up of bones, cartilage, ligaments, tendons and muscles, which form a framework for the body. Tendons, ligaments and fibrous tissue bind the structures together to create stability, with ligaments connecting bone to bone, and tendons connecting muscle to bone.
13. The muscles found in the limbs are voluntary or skeletal muscles while those in the lungs are involuntary or smooth muscles. Skeletal muscles are attached to the bones of the skeleton hence called so. They can be moved as per will. They contain cylindrical fibres.
14(a). Meristematic tissues are responsible for the primary and secondary growth of the plants whereas permanent tissue is responsible for various growths. Meristematic tissue has dense cytoplasm with prominent nucleus whereas permanent tissue has thin cytoplasm with normal nucleus.
14(b). Differentiation: 1 The process by which cells become progressively more specialized; a normal process through which cells mature. This process of specialization for the cell comes at the expense of its breadth of potential. Stem cells can, for example, differentiate into secretory cells in the intestine.
14(c). Plant Tissue – Meristematic Tissue, Permanent Tissue – Simple Permanent Tissue: Parenchyma, Chlorenchyma. Complex Permanent Tissue: Xylem, Phloem.
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