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In botany, a stoma also called a stomate ( pl. : stomates), is a pore found in the epidermis of leaves, stems, and other organs, that controls the rate of ...
أسئلة أخرى
15‏/09‏/2024 · Stomate, any of the microscopic openings or pores in the epidermis of leaves and young stems. Stomata are generally more numerous on the underside of leaves.
Stomata are small pores on leaf surfaces formed by a pair of flanking guard cells that swell or deflate in response to turgor pressure.

ثغر (Stoma)

نبات
الثغر أو المسام أو تُغَيرات وجمعها ثغور هي فتحة دقيقة جداً على السطح الخارجي لورقة النبات تسمح بتبادل الغازات بين النبات والجو. توجد معظم الثغور على الجهة السفلية للأوراق لتجنب أشعة الشمس المباشرة وبذلك يتم تقليل التبخر من الأوراق. ويكيبيديا
18‏/11‏/2022 · On the underside of leaves and elsewhere, depending on the plant, are tiny openings called stomata — thousands of them per leaf with variations ...
Stomata are tiny openings or pores in the plant tissue that allow for gas exchange. They are mostly found on the lower surface of dicot plants' leaves.
07‏/05‏/2018 · Stomata are tiny, microscopic and critical for photosynthesis. Thousands of them dot on the surface of the plants. Understanding how stomata ...
07‏/09‏/2024 · Stomata are tiny openings or pores in plant tissue that allow for gas exchange. Stomata are typically found in plant leaves but can also be ...
فيديو عن stomata
24‏/04‏/2023 · photosynthesis #stomata #ngscience https://ngscience.com Stomata play a pivotal role in the ...
المدة: 2:04
تاريخ النشر: 24‏/04‏/2023
Stomata, which means “mouths” in Greek, do indeed resemble tiny mouths surrounded by swollen lips. The “lips” are actually individual cells (called guard cells) ...
Stomata are openings in between guard cells that allow plants to exchange gases, such as carbon dioxide and water vapor, with their outside environment.