What are the benefits of the leaf and what is the role of the leaf?

Regulate qi and blood, chase cold and dampness; Warm menstruation, stop bleeding, and stabilize the fetus. Treatment of cold pain in the heart and abdomen, diarrhea and tendons, dysentery, vomiting, blood, menstrual irregularities, leakage, belt, fetal restlessness, carbuncle ulcers, scabies.

Mugwort is also known as fragrant mugwort, mugwort, mugwort, bitter, bitter, warm, into the spleen, liver, kidney meridian. It can dissipate cold and dehumidify, warm menstruation and stop bleeding. It is suitable for deficiency cold bleeding and abdominal pain, and has obvious curative effect on women's deficiency cold menstrual irregularities, abdominal pain and leakage, and is a good medicine.

Now is the time when wormwood is on the market, and wormwood can be used as mugwort snacks and processed into various dishes and medicinal diets.

Antibacterial effect: Moxa smoke can also reduce the bacteria on the burn wound. After moxibustion**, the disease progression of guinea pig tuberculosis is slower and the lesion is milder, especially in the later stage of the disease. In addition, it can also enhance the phagocytic response of reticuloendothelial cells, but the degree of enhancement is not as significant as that when the animal acquires immunity; The phagocytosis of guinea pig reticuloendothelial cells is consistent with that of tuberculous lesions in internal organs, and when the liver and spleen are damaged by the disease, the phagocytic function decreases.

In addition, it also has antifungal effect, antiasthmatic effect, choleretic effect, inhibition of platelet aggregation, hemostatic effect, gastrointestinal tract and uterine effect, cardiovascular system effect, anti-allergic effect, etc.

Artemisia leaves have the effect of driving away evil spirits, warming menstruation, and dispersing harm, and soaking feet in boiled water with mugwort leaves in winter can strengthen the body, especially for female comrades with cold hands and feet, dysmenorrhea, etc.

Leaves are the main organs of photosynthesis and transpiration of green plants, and also have certain absorption, reproduction and storage functions.

1. Photosynthesis.

Green plants absorb sunlight energy (mainly inside the leaves), synthesize organic matter from carbon dioxide and water, and release oxygen, a process called photosynthesis. Photosynthesis is the basis of all material metabolism and energy metabolism in living organisms, and occupies a unique position in various pathways of metabolism. It is of great significance to the ecological balance of nature and the survival of human beings.

2. Transpiration.

It is the process by which water is lost into the atmosphere from living plants in a gaseous state. It has a positive meaning in plant life:

First, transpiration is one of the driving forces for root water absorption;

Second, the minerals absorbed by the root system mainly rise with the transpiration flow, and transpiration is beneficial to the operation of mineral elements in the plant.

Thirdly, transpiration can reduce the surface temperature of the leaves, so that the leaves will not be damaged by excessive temperature under strong sunlight.

3. Absorption and secretion.

For example, extra-root fertilization, i.e. spraying a certain concentration of fertilizer on the foliage, is to take advantage of the absorption of the leaves. For example, the spraying of pesticides (such as organophosphorus insecticides) and the spraying of herbicides also work through the absorption of leaf surfaces into human plants.

4. Reproduction.

The leaves of some plants can also reproduce, forming adventitious roots and adventitious buds at the veins at the edge of the leaves. When they detach from the parent leaves, they can form new plants independently. For example, when they fall off from the mother, they can form new plant bodies.

This physiological function of leaves is often used to propagate certain plants. For example, when propagating citrus, lemon and begonia, leaf cuttings can be used; Leaves also have the function of storing nutrients, such as onions, lilies, garlic and other scales.

1. It can carry out photosynthesis, 2. It can play the role of transpiration and emit water, 3. It absorbs nutrients, 4. It can resist the bad environment and protect plants.

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The role of the leaves is as follows:

1. Respiration: The gas respirated into the plant can diffuse to all parts of the plant to meet its growth needs;

2. Photosynthesis: This refers to the process in which green plants absorb light energy, synthesize carbon dioxide and water into energetic organic matter, and release oxygen at the same time;

3. Nutrient transformation: plants inhale carbon dioxide from the air through the stomata on the leaves, absorb water from the soil through the roots, and then transport the water to the leaves, carbon dioxide and water meet in the chloroplasts, and are converted into starch and other nutrients under the irradiation of sunlight for plant growth;

4. Transpiration: This is the main driving force for the absorption and transportation of water by plants.

Leaves, one of the vegetative organs of vascular plants. Its function is to carry out photosynthesis to synthesize organic matter, and it has transpiration, providing the power for the root system to absorb water and mineral nutrients from the outside world. Those with three parts: leaf, petiole and supporting leaf are called "complete leaves", such as missing petioles or supporting leaves are called "incomplete leaves"; It is divided into single leaf and compound leaf.

1. Photosynthesis and respiration.

Photosynthesis is essentially the process by which green plants use light energy through chloroplasts to synthesize carbon dioxide and water into energy-storing glucose (further forming starch) and release oxygen. The process of respiration is the opposite of photosynthesis, in essence: plants absorb oxygen from the air, break down organic matter (starch or glucose) into carbon dioxide and water, and at the same time release the energy needed for plant growth.

2. Transpiration.

Of the water inhaled by plants, only 1 is actually used for various physiological processes and retained in the plant, while 99% of the water is consumed by transpiration. Transpiration is the main driving force for plants to absorb water and transport water in the body, tall trees, without the pulling force of transpiration, it is impossible for water to reach the crown.

Transpiration also facilitates the uptake of inorganic salts from the soil by the roots, as well as the transport of inorganic salts within the plant. There is also transpiration that can reduce the foliar temperature. In the middle of summer, if there is no transpiration to dissipate the heat energy, it only takes a few minutes to burn the plant to death.

Strong transpiration protects plants from the scorching sun. The leaves of some plants also serve to store nutrients and reproduce.

The role of leaves on the outside world and humans:

1. Regulate the climate and purify the air.

With the development of industry and agriculture, a large number of harmful gases are discharged in the production process, such as sulfur dioxide, hydrogen fluoride, etc. These harmful gases are absorbed by the leaves of some plants. For example, oleander leaves, in polluted areas, can absorb grams of sulfur per day.

Paulownia, sycamore, boxwood, etc. have a strong ability to absorb hydrogen fluoride and can also absorb chlorine. The leaves of these plants are nature's air purifiers.

2. Noise prevention and control.

It has been determined that a 40-meter-wide forest belt can reduce noise by 10-15 decibels, a 30-meter-wide forest belt can reduce noise by 6-8 decibels, and a patch of trees in urban parks can reduce noise by 26-43 decibels. Green streets, with lush foliage, can reduce noise by 8-10 decibels.

3. It can be used as a beverage, as a feed, and as a medicinal material.

4. Check air pollution.

Dust is the main physical air pollutant. Green plants all have the effect of dust retention, but the amount of dust retention is related to tree species, forest belt width, planting status and meteorological conditions. Climatic conditions are also the key factors affecting the absorption of pollutants by plants, and the absorption capacity of plants is stronger in spring and autumn, and the absorption capacity of different pollutants by different plants is quite different.

5. Bionic utilization in architecture.

6. Forecast meteorology, forecast**.

The dripping Guanyin flower drips water before it rains. That's forecasting weather. Leaves will fall unusually, that's the forecast.

7. As writing paper and process material.

8. Provide food and energy for human beings.

Photosynthesis, respiration, transpiration, storage, heat dissipation in summer heat, and the reproduction of leaves of some plants (such as falling roots, etc.).

Photosynthesis, respiration.

Respiration, transpiration, and photosynthesis.

Main functions of epidermal cells under broad bean leaves:

Epidermal cells and guard cells, where there are two types of "energy converters" in guard cells that can convert energy between light energy, chemical energy, heat energy, etc., they are chloroplasts and mitochondria.

The green part of the plant contains chloroplasts, which are unique to green plants and are the site of photosynthesis, and the chlorophyll in chloroplasts is able to absorb light energy. It converts light energy into chemical energy and stores the chemical energy in the organic matter it makes. Mitochondria are the site of respiration, releasing chemical energy stored in organic matter to provide energy for the life activities of cells.

Significance of epidermal cells:

The main role of the outer layer of the cells of animals and plants is to protect, but also has other functions, such as secreting the stratum corneum. The epidermis of green plants also has pores that regulate the flow of gases in and out.

Epidermal cells generally do not have chloroplasts, the surface is mostly irregular, and the side walls are often convex and uneven, chimeric with each other, closely connected, and there is no gap except for stomata; The cross-sectional view is rectangular or square, with a thick outer wall and a stratum corneum.

However, the stratum corneum is not completely impermeable, and foliar fertilization is used in production, that is, after spraying the leaf surface with molten aluminum, part of it enters the leaf through the stomata, and part of it enters through the epidermal cuticleum.

Leaves are important organs for plants to photosynthesize, make nutrients, carry out gas exchange and water transpiration. Leaves, one of the vegetative organs of vascular plants, are responsible for photosynthesis to synthesize organic matter, and have transpiration, providing power for roots to absorb water and mineral nutrients from the outside world.

Leaves are the main organs of plant assimilation and transpiration, and they are considered to be the most sensitive and malleable organs to environmental changes in the process of plant evolution. Leaf anatomy has been shown to be closely related to the internal and external materials, energy exchange and self-protection of leaves, which is the backbone of leaf morphological structure, and is also one of the important contents of studying leaf morphological structure characteristics and plant ecological adaptation strategies.

Water absorption and nutrient absorption by leaves have always been the way for plants to obtain water nutrients.

Absorbing water through the surface is the traditional art of living beings, not to mention plants, even people, more or less can absorb a certain amount of water through **. However, an important problem for terrestrial organisms with complex structures is not how to drink water, but how to prevent dehydration. It may seem convenient to ingest water through the surface, but this thing not only absorbs water, but also evaporates water from it.

Therefore, terrestrial organisms have evolved a series of keratin structures on the surface to prevent dehydration and control the evaporation of water on the surface. Therefore, starting from ferns, the water content of most terrestrial plants has become a specialized organ: roots.

But that doesn't mean they can't absorb water through the leaves.

The main function of the leaf veins of plants is to transport water and nutrients to various parts. Leaf veins are vascular bundles of different thicknesses distributed on leaves, which play a role in transporting and supporting mesophyll tissues.

The internal structure of the veins varies with the size of the veins. On the one hand, it provides water and inorganic salts for the leaves, outputs photosynthetic products, and on the other hand, supports the leaves, enables them to stretch out in space, and ensures the smooth progress of the physiological functions of the leaves.