Specialized Plant Cells
Specialized Plant Cells
There are 4 types of Specialized Cells found in Plants:
Root Hair Cells
Palisade Cells
Xylem
Phloem
1. Root Hair Cells
Root Hair Cells are cells that are found in the root of a plant.
The roots job is to hold plants in their place when they're growing and absorbing water and minerals from the soil.
They are divided into smaller and smaller branches as they travel into the soil.
The outside surface of roots is covered with root hair cells, which they have 'tiny' little hairs that poke through the soil; this massively enlarges the surface area for the root hair cells.
Important - Root hair cells increase surface area to allow for maximum absorption of water and minerals from the soil.
2. Palisade Cells
Palisade are found in leaves, under the outer epidermis and it often makes up most of the leaf.
When the sun shines, they collect most of the light energy the leaves uses for photosynthesis which makes sugar for growth, doing reproduction and other life procedures.
Photosynthesis occurs in a special pigment called chlorophyll, which are found in one of many organelles in the plant called chloroplast.
Important - Palisade cells are the major area of photosynthesis and they are well adapted for this function because:
They are towards on top of the leaves for maximum light
They have a lot of chloroplasts
3. Xylem Cells
Xylem cells can run inside stems of plants from their roots to their leaves.
Important - Xylem Cells die and their ends break down.
This allows them to form long tubes to carry water upwards for photosynthesis.
They have a thick cell walls to provide support to the plant, holding up the leaves for photosynthesis and the flowers up for reproduction.
Xylem = Water
4. Phloem Cells
Phloem Cells are often near the Xylem cells in the stem.
Important - Unlike xylem cells, phloem cells are still alive.
They carry sugary water from the leaves to the rest of the plants.
Important - Next to the phloem are the companion cells which have many mitochondria; here respiration occurs to release energy from glucose to transport sugar and other substances in the phloem.
Phloem = Food and Sugary Water
Internal Structure of a Leaf