(1)Why is meristematic tissue important for the plant?
(2)Name and explain different types of simple permanent tissues found in plants?
(3)Which tissue produces the RBC in humans?
(4)What will happen if ligament is over stretched.
(5)What are complex tissues? Name the complex tissues and their components found in plants.
(2)Name and explain different types of simple permanent tissues found in plants?
(3)Which tissue produces the RBC in humans?
(4)What will happen if ligament is over stretched.
(5)What are complex tissues? Name the complex tissues and their components found in plants.
1
They are important because they perform the following functions Functions of Meristematic Tissue:
1. Meristems are actively dividing tissues of the plant.
2. They are responsible for primary (elongation) and secondary (thickness) growth of the plant.
3. All new organs and their growth occur by the division of meristematic tissue.
4. Secondary tissues such as, wood, cork are also formed due to activity of meristematic tissue.
2-
Simple Permanent Tissues These tissues are simple. They are made up of only one type of cell. Here, all the cells that make up the tissue are similar and have the same structure, with the same type parts. Simple permanent tissues are again classified into three main types. They are parenchyma, collenchyma, and sclerenchyma.
- Parenchyma – The cells of this tissue are living, with thin cell walls. Cells can be oval or round in shape. They have a large central vacuole and a dense cytoplasm. The parenchyma tissue is located in the soft parts of the plant such as cortex and pith. It mainly acts as a packing tissue, providing mechanical support. It also helps in the storage of food.Based on the specific functions, parenchyma can be further classified into Aerenchyma and Chlorenchyma.
- Collenchyma – These cells are living cells and have an elongated shape. The corners of the cell wall are thickened. There is very little intercellular space present. The collenchyma tissue can be located in the leaf stalks, below the epidermis etc. Its main function is to provide flexibility to the plants as well as mechanical support.
- Sclerenchyma – The cells of the sclerenchyma tissue are dead. The cell wall is very thick due to deposition of lignin. The cells of this tissue can be in different shapes and sizes. They are generally located in the leaf veins, hard coverings of the seeds and can also be found surrounding the vascular bundle. The main function of the sclerenchymatic tissue is to provide rigidity and mechanical support to the plant body. They also make the plant stiff and hard.
3- bone marrow
4-
Ligaments are strong band of fibers of connective tissues that connect bones, cartilages and hold joints of the body. In as much as ligaments are elastic, they are vulnerable to overstretching.
Overstretching in them can cause the ligaments to have small tears in its fibers, twist or tear apart completely. This may result in severe pain in the affected part accompanied by swelling.
5- Complex Permanent Tissue The complex permanent tissues are made up of more than one type of cell. They coordinate together to perform the same specialized functions in the plant body. They are classified into two types – Xylem and Phloem
- Xylem – The xylem tissue is responsible for the conduction of water and minerals from the roots to the leaves and stem. It also provides support to the plants. It has four elements. They are tracheids, vessels, xylem parenchyma and xylem fibres.
- Phloem – This complex permanent tissue helps in the translocation of food that is prepared by photosynthesis in the leaves to various parts of the plant. Phloem consists of four elements. They are sieve tubes, companion cells, phloem fibres and phloem parenchyma.
They are important because they perform the following functions
Functions of Meristematic Tissue:
1. Meristems are actively dividing tissues of the plant.
2. They are responsible for primary (elongation) and secondary (thickness) growth of the plant.
3. All new organs and their growth occur by the division of meristematic tissue.
4. Secondary tissues such as, wood, cork are also formed due to activity of meristematic tissue.
2-
These tissues are simple. They are made up of only one type of cell. Here, all the cells that make up the tissue are similar and have the same structure, with the same type parts. Simple permanent tissues are again classified into three main types. They are parenchyma, collenchyma, and sclerenchyma.
- Parenchyma – The cells of this tissue are living, with thin cell walls. Cells can be oval or round in shape. They have a large central vacuole and a dense cytoplasm. The parenchyma tissue is located in the soft parts of the plant such as cortex and pith. It mainly acts as a packing tissue, providing mechanical support. It also helps in the storage of food.Based on the specific functions, parenchyma can be further classified into Aerenchyma and Chlorenchyma.
- Collenchyma – These cells are living cells and have an elongated shape. The corners of the cell wall are thickened. There is very little intercellular space present. The collenchyma tissue can be located in the leaf stalks, below the epidermis etc. Its main function is to provide flexibility to the plants as well as mechanical support.
- Sclerenchyma – The cells of the sclerenchyma tissue are dead. The cell wall is very thick due to deposition of lignin. The cells of this tissue can be in different shapes and sizes. They are generally located in the leaf veins, hard coverings of the seeds and can also be found surrounding the vascular bundle. The main function of the sclerenchymatic tissue is to provide rigidity and mechanical support to the plant body. They also make the plant stiff and hard.
3- bone marrow
4-
Ligaments are strong band of fibers of connective tissues that connect bones, cartilages and hold joints of the body. In as much as ligaments are elastic, they are vulnerable to overstretching.
Overstretching in them can cause the ligaments to have small tears in its fibers, twist or tear apart completely. This may result in severe pain in the affected part accompanied by swelling.
5- Complex Permanent Tissue
The complex permanent tissues are made up of more than one type of cell. They coordinate together to perform the same specialized functions in the plant body. They are classified into two types – Xylem and Phloem
- Xylem – The xylem tissue is responsible for the conduction of water and minerals from the roots to the leaves and stem. It also provides support to the plants. It has four elements. They are tracheids, vessels, xylem parenchyma and xylem fibres.
- Phloem – This complex permanent tissue helps in the translocation of food that is prepared by photosynthesis in the leaves to various parts of the plant. Phloem consists of four elements. They are sieve tubes, companion cells, phloem fibres and phloem parenchyma.
