The most abundant plant tissue with thin cell walls and intercellular spaces
The spongy layer or mesophyll has many air spaces.
PARENCHYMA: 1) the tissue consists of thin-walled living cells. 2) it is distributed in almost all the parts of the plant body . 3) the living cells of parenchyma assimilate and store food .They also store waste products. 4) It contain dense cytoplasm. 5) Intercellular spaces may or may not be present. COLLENCHYMA: 1)the tissue consists of cells having localized thickening in their cell walls 2)it occurs mostly in the aerial parts of the plants restricted to the other layers 3)collenchyma is the chief mechanical tissue of the young parts of the plant particularly in the young dicotyledonous stems. in parenchyma cells are thin walled having intercellular spaces.and in collenchyma cells are thick walled having the absence of intercellular spaces. 4) It contain cellulose and pectin. 5) Intercellular spaces are totally absent. 6) Collenchyma is present in peripheral regions.
Parenchyma cells are the most abundant.
diffusion through the stomata often located in the aerial organs of the plant aka the leaves of the plant. There is a low concentration of oxygen in the air spaces between the spongy mesophyll as oxygen is constantly used by respiring plant tissue and visa versa occurs when the plant begins to photosynthesise
The Xylem Tissue
Intercellular spaces are there for gas exchange between cells. Because of these spaces, cells deeper in the tissue can get the gas. If not, only the cells on the surface will get what they need.
to let gases go from 1 cell to another
The spongy layer or mesophyll has many air spaces.
Meristematic tissues are cells or group of cells that have the ability to divide. These tissues in a plant comprise small, densely packed cells that can keep dividing to form new cells. Meristems have the following characteristics:The cells are small,The cells walls are thin,Cells have large nuclei,Vacuoles are absent or very smallThere are no intercellular spaces
PARENCHYMA: 1) the tissue consists of thin-walled living cells. 2) it is distributed in almost all the parts of the plant body . 3) the living cells of parenchyma assimilate and store food .They also store waste products. 4) It contain dense cytoplasm. 5) Intercellular spaces may or may not be present. COLLENCHYMA: 1)the tissue consists of cells having localized thickening in their cell walls 2)it occurs mostly in the aerial parts of the plants restricted to the other layers 3)collenchyma is the chief mechanical tissue of the young parts of the plant particularly in the young dicotyledonous stems. in parenchyma cells are thin walled having intercellular spaces.and in collenchyma cells are thick walled having the absence of intercellular spaces. 4) It contain cellulose and pectin. 5) Intercellular spaces are totally absent. 6) Collenchyma is present in peripheral regions.
Spongy Layer - A layer of the mesophyll. The spongy layer consists of chloroplasts and parenchyma cells, and relatively large intercellular spaces. It is far less ordered than the palisade layer, and the intercellular spaces are important in gas exchange and transpiration.
It acts a Save s a protective layer to the plant against injury and drying-out of its inner parts. The shape of the epidermal cells are bricked shaped and has no intercellular spaces. the thick outer cellular walls contain cellulose and pectin which provides protection. Epidermal cells are transparent and contains chloroplast. The epidermis allows sunlight to reach tissues deeper in the plant espescially the leaves and the stem, it protects softer tissues in the plant from mechanical injury.
Parenchyma cells are the most abundant.
diffusion through the stomata often located in the aerial organs of the plant aka the leaves of the plant. There is a low concentration of oxygen in the air spaces between the spongy mesophyll as oxygen is constantly used by respiring plant tissue and visa versa occurs when the plant begins to photosynthesise
Throughout the plant in a tissue analagous to the vascular system but filled with gas. This specialized tissue can be called "aerenchyma." It is used for storage of oxygen, and conveyance of oxygen from the photosynthetic areas of the plant down to the rhizomes and roots. It also is used to maintain buoyancy of the photosynthetic part of the plant, keeping it upright.
The outermost layer of cells is called the epidermis.The epidermis protects all the part of the plant from water loss,mechanical support and invasion of parasitic fungi.As it is a protective tissue it is a continuous layer without any intercellular space
Meristematic tissue is the only plant tissue that produces new cells in mitosis.