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प्रश्न
Structural organisation in animals attains different levels as cell - organ - organ system. What is missing in this chain? Mention the significance of such an organisation.
उत्तर
Tissue is missing in this chain. In multicellular animals, a group of similar cells along with intercellular substances perform a specific function. Such an organisation is called tissue. Tissues are organised in specific proportions and patterns to form an organ like stomach, lung, heart and kidney. When two or more organs perform a common function by their physical and/or chemical interaction, they together form organ systems, e.g., digestive system, respiratory system, etc. Cells, tissues, organs and organ systems split up the work in a way that exhibits division of labour and contributes to the survival of the body as a whole.
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संबंधित प्रश्न
Answer in one word or one line
What is the position of ovaries in cockroach?
Draw a labelled diagram of alimentary canal of a cockroach
Dorsally placed sclerites in cockroach are termed as :
Which of the following characteristics is incorrect with respect to cockroaches?
Match the following with reference to cockroach and choose the correct option
| Column I | Column II |
| A. Phallomere | i. Chain of developing ova |
| B. Gonopore | ii. Bundles of sperm |
| C. Spermatophore | iii. Opening of the ejaculatory duct |
| D. Ovarioles | iv. The external genitalia |
How many times do nymphs moult to reach the adult form of cockroach?
Complete the following statement:
In cockroach grinding of food particle is performed by ______.
Complete the following statement:
Malpighian tubules help in removal of ______.
Complete the following statement:
Hind gut of cockroach is differentiated into ______.
Complete the following statement:
In cockroach blood vessels open into spaces called ______.
