Question

Внутреннее строения листа

Answer 1

Ответ:

Внутренне строение листа

Answer 2

Объяснение:

основная часть мякоть

Answer 3

Internal Structure of a Leaf

The internal structure of a leaf is composed of several key components that enable its function in photosynthesis and gas exchange. Let's explore these components in detail:

1. Epidermis: The outermost layer of the leaf is called the epidermis. It consists of two types of cells: the upper epidermis and the lower epidermis. The epidermis is usually transparent and helps to reduce water loss through its waxy cuticle.

2. Stomata: Stomata are small openings found on the surface of the leaf, primarily on the lower epidermis. They are surrounded by specialized cells called guard cells. Stomata play a crucial role in gas exchange, allowing carbon dioxide to enter the leaf for photosynthesis and releasing oxygen and water vapor.

3. Mesophyll: The mesophyll is the tissue located between the upper and lower epidermis. It is divided into two layers: the palisade mesophyll and the spongy mesophyll. The palisade mesophyll is composed of tightly packed, elongated cells that contain many chloroplasts for photosynthesis. The spongy mesophyll, on the other hand, consists of loosely arranged cells with air spaces that facilitate gas exchange.

4. Veins: Veins are vascular tissues that run through the leaf and provide support, as well as transport water, minerals, and sugars. They are composed of xylem and phloem vessels. Xylem transports water and minerals from the roots to the leaves, while phloem transports sugars produced during photosynthesis to other parts of the plant.

5. Chloroplasts: Chloroplasts are the organelles responsible for photosynthesis. They contain a green pigment called chlorophyll, which captures light energy and converts it into chemical energy. Chloroplasts are mainly found in the palisade mesophyll cells, where they absorb light for photosynthesis.

6. Guard Cells: Guard cells are specialized cells that surround the stomata. They control the opening and closing of the stomata, regulating the exchange of gases and the loss of water through transpiration. When the guard cells are turgid, the stomata open, allowing gas exchange. Conversely, when the guard cells lose water, they become flaccid, closing the stomata to reduce water loss.

It's important to note that the internal structure of leaves can vary among different plant species and even within different types of leaves on the same plant. These variations are adaptations to different environmental conditions and plant requirements.

I hope this information helps! Let me know if you have any further questions.