Show MorePlant Tissues
A mature vascular plant (any plant other than mosses and liverworts), contains several types of differentiated cells. These are grouped together in tissues. Some tissues contain only one type of cell. Some consist of several.
Tissue is a cellular organizational level intermediate between cells and a complete organism. A tissue is an ensemble of similar cells and from the same origin, that together carry out a specific function. These are called tissues because of their identical functioning. Organs are then formed by the functional grouping together of multiple tissues.
Examples of tissue in other multicellular organisms are vascular tissue in plants, such as xylem and phloem. Plant tissues are categorized broadly into…show more content…
The upper and lower epidermis of the leaf are examples of protective tissue [View].
The cells of parenchyma are large, thin-walled, and usually have a large central vacuole. They are often partially separated from each other and are usually stuffed with plastids.
In areas not exposed to light, colorless plastids predominate and food storage is the main function. The cells of the white potato are parenchyma cells. [View]
Where light is present, e.g., in leaves, chloroplasts predominate and photosynthesis is the main function. [View]
The walls of these cells are very thick and built up in a uniform layer around the entire margin of the cell. Often, the cell dies after its cell wall is fully formed. Sclerenchyma cells are usually found associated with other cells types and give them mechanical support.
Sclerenchyma is found in stems and also in leaf veins. [View] Sclerenchyma also makes up the hard outer covering of seeds and nuts.
Collenchyma cells have thick walls that are especially thick at their corners. These cells provide mechanical support for the plant. They are most often found in areas that are growing rapidly and need to be strengthened. Thepetiole ("stalk") of leaves is usually reinforced with collenchyma [View].
Xylem conducts water and dissolved minerals from the roots to all the other parts of the plant.
In angiosperms, most of the water travels in the xylem vessels. These are thick-walled
Plants play a very important part in our daily life. Greenery is essential to make the environment healthy and pollution free. With people becoming aware of the deterioration of the quality of the air, they have assumed more significance than ever before. Let’s find out how they impact our lives in detail?
Food: Plants are considered as the only producers of the food. They also provide food to humans and animals. Due to the presence of nutrients such as carbohydrates and proteins, plants have become indispensable for the survival of life on earth. Numerous foods forms such as vegetables, fruits and mushrooms are procured from the plants and they have become the staple diet of the humans over a period of time.
Clothes: If you are thinking clothes are made chemically, it is a misconception. In fact, cotton used for making shirts and trousers is produced from the crop. The fabric material is environment-friendly and doesn’t pollute the atmosphere. In addition, jute used for making a large number of yarns is grown from the crops in the field. They are produced in huge amounts, processed and send to the market.
Furniture and homes: Trees provide us wood to make amazing and classy furniture that last for a very long period of time. For instance, oak and timber are used in lots of applications. They are known for durability, style and finishing to enhance the appearance of the home. If plants are present in the vicinity of the person, they tend to reduce stress and anxiety.
Flowers: The growth of flowers in the garden plays a very important role in changing the mood of the people. They are available in different varieties as well as vibrant colors to impart aesthetic beauty to the surroundings. Flowers are also used in making garlands and for religious purposes. They emit fragrance of different varieties and captivate the imagination of the people.
Medications: Plants are rich sources of medicines that assist in the treatment of various ailments. For instance, Ginseng is used for enhancing the immunity of the body. Moreover, Digoxin procured from the plants is vital in cases of heart failure.
Also read:Usage of biology in everyday life
Ecological balance: Plants make food by absorbing carbon dioxide and releasing oxygen into the atmosphere. Oxygen is important for the humans to breathe as they increase the blood circulation in the body. Planting trees in large numbers prevent the soil erosion and reduces the instances of the natural flood. If the carbon dioxide is absorbed from the environment, it helps to reduce the greenhouse effect. Due to a large number of plants and trees, people do not get plenty of rainfall.
Improvement in soil fertility: One of the most important effects of planting trees is that they increase the soil fertility by many notches. Dried and dead leaves fall onto the ground and provide manure to the soil. It plays a very important role in enhancing the fertility to create more trees.
In a nutshell, it can be said that plants are necessary for sustaining all kinds of life forms on the planet.
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