Question

Differentiate between chlorenchyma and Aerenchyma. What is lignin? Where is it present. What is lymph? What are its functions? How muscles are able to contract and relax to bring about movements. Please give the write answer and if you don't know please don't answer who will give the correct answer will get 15 points and i will also mark your answer as brainliest

Answer 1

Explanation:

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Answer 2

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1. The key difference between chlorenchyma and aerenchyma is that chlorenchyma is a specialized parenchyma tissue that contains chloroplasts and carries out photosynthesis while aerenchyma is a spongy tissue that contains large air spaces. Parenchyma tissue is one of the three types of ground tissues in plants.
2. Lignin is a chemically complex substance found in many plants, which bonds the cellulose fibers. It forms the woody cell walls of plants and the "cement" between them. Lignin is found together with cellulose and is resistant to biological decomposition. Lignin is the chief constituent of wood other than carbohydrates.
3. Lignin is found in the middle lamella, as well as in the secondary cell wall of xylem vessels and the fibers that strengthen plants. It is also found in epidermal and occasionally hypodermal cell walls of some plants.
4. Lymph is a clear-to-white fluid made of: White blood cells, especially lymphocytes, the cells that attack bacteria in the blood. Fluid from the intestines called chyle, which contains proteins and fats.
5. Your lymphatic system, part of your immune system, has many functions. They include protecting your body from illness-causing invaders, maintaining body fluid levels, absorbing digestive tract fats and removing cellular waste.
6. Muscles are special fibers in the body that contract and relax to cause movements. Movement is caused by the contraction and relaxation of muscles. When one muscle contracts, the other relaxes and this causes displacement. The muscles of our heart are called involuntary muscles as they don't work according to our will.

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