Tissues Complete Chapter🔥| CLASS 9th Science| NCERT covered | Prashant Kirad
Exphub 9th &10th・2 minutes read
Prashant Bhaiya introduces the concept of plant tissues through stories, emphasizing understanding over memorization, explaining the differences between meristematic and permanent tissues in plant growth and functioning. The lecture discusses the various types of tissues, including parenchyma, sclerenchymatous, xylem, phloem, epithelial, muscular, and connective tissues, highlighting their functions and importance in plant and animal biology.
Insights
- Plant tissues consist of meristematic and permanent tissues, with the former focusing on growth and cell division, while the latter serves specific functions and lacks growth capabilities.
- Meristematic tissues include apical, lateral, and intercalary meristems, each responsible for distinct growth functions in plants.
- Permanent tissues like parenchyma, chyme, and sclerenchymatous tissues provide support, storage, and toughness to plants, with varying cell structures and functions.
- Understanding the differences between xylem and phloem, including their roles in water and food transport, living and dead components, and mechanical support, is crucial for comprehending plant biology.
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Recent questions
What are plant tissues?
Plant tissues are groups of cells with similar shapes and functions that work together to perform specific activities in plants. They form organs and organ systems to carry out essential functions in the plant's body.
What is the difference between meristematic and permanent tissues?
Meristematic tissues focus on plant growth, with cells capable of division and small in size, while permanent tissues do not focus on growth, have larger cells with varying shapes, and lack vacuoles. Meristematic tissues gradually convert into permanent tissues over time.
How do apical meristems contribute to plant growth?
Apical meristems are found at the tips of stems and roots, promoting upward and downward growth in plants. They help increase stem or root length through primary growth, which refers to length and height increase in plants.
What are the key components of phloem tissues?
Phloem tissues consist of sieve tubes, companion cells, phloem fibers, and phloem parenchyma, each serving specific functions in food transportation and storage within plants. The sieve tube acts as a transport system for food, while phloem fibers provide mechanical support to the sieve tube.
How do xylem and phloem tissues differ in function?
Xylem tissues transport water, providing mechanical strength to the plant, while phloem tissues transport food and support the sieve tube for efficient food transportation. Xylem has dead cells like tracheids and vessels, while phloem has living components like sieve tubes and companion cells.
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