Sclerenchyma tissue provides strength to coconut husk fibres because of thick lignified walls. Living parenchyma cells have thin walls and soft structure mainly for storage, so they cannot provide the hardness, toughness and durability needed for mats.
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Food prepared in leaves is transported by phloem tissue. Sieve tubes carry dissolved food materials from leaves to roots, stems and storage organs, while companion cells help regulate loading and unloading of sugars during transportation.
Dead xylem vessels form continuous tubes for water transport. Living leaf cells lose water through transpiration, creating transpiration pull. This pull draws water upward through xylem against gravity, maintaining continuous movement from roots to leaves in plants.
Nervous tissue enables us to sense heat or cold. Specialised nerve cells called neurons receive sensory information from receptors in the skin and transmit messages to the brain, which interprets the sensations and produces appropriate responses.
Blood clotting is caused by platelets present in blood. When injury occurs, platelets gather at the wound and help form a clot, preventing excessive blood loss and protecting the body from harmful microorganisms entering through cuts.