Question 4
Describe connective tissue. How is it different from other tissues?
The connective tissue consists of cells with spaces between them. These spaces are filled with a matrix or ground substance. The living cells produce the non-living matrix, which could be a liquid (in blood), semi-solid (connective tissue proper) or solid (bone). The connective tissues join different parts of the body and provide support to them. They also fill up the space between various organs. They are further classified into following types:
- Connective tissue proper — This tissue connects various parts of the body. It connects muscles to bones, bones to other bones and gives support by filling up spaces between the organs.
- Skeletal tissue — It is solid connective tissue which provide support to the body. It constitutes of bone and cartilage.
- Fluid connective tissue — It is the liquid connective tissue consisting of blood and lymph. It has functions like transportation of oxygen and nutrients and fighting infection.
The connective tissue is different from other tissues because it has cells that are separated from each other. The space between the cells is composed of different intercellular substances that form the matrix or ground substance.
Chapter 4: Tissue — ICSE Class VII Biology Notes
Complete ICSE Class VII Biology notes on Tissue covering meristematic and permanent plant tissues (parenchyma, collenchyma, sclerenchyma, xylem, phloem) and four animal tissue types with examples and diagrams.
Key Concepts and Topics
Topics covered: Meristematic tissue, Permanent tissue, Animal tissues, Xylem, Phloem
Weightage: Approximately 8 marks in the exam
Important Points to Remember
- Tissue: group of similar cells performing specific function
- Meristematic tissue: actively dividing cells at growth points
- Simple permanent: parenchyma (storage), collenchyma (flexibility), sclerenchyma (strength)
- Complex permanent: xylem (water up) and phloem (food both ways)
- Four animal tissues: epithelial, connective, muscular, nervous
- Three muscle types: skeletal, smooth, cardiac
- Blood is a connective tissue with liquid matrix
Frequently Asked Questions
Q: What is a tissue?
A: A tissue is a group of similar cells that perform a specific function together.
Q: What is the difference between xylem and phloem?
A: Xylem transports water upward and is made of dead cells. Phloem transports food in both directions and is made of living cells.
Q: Why is blood called a connective tissue?
A: Because it connects all body parts by transporting nutrients, oxygen, and waste, even though its matrix (plasma) is liquid.
Exam Preparation Tips
- Focus on understanding concepts rather than rote memorization
- Practice drawing and labelling diagrams regularly
- Use comparison tables for topics that require differentiation
- Solve previous year questions and practice papers
- Review the chapter notes provided by Bright Tutorials for comprehensive coverage
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