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ICSE Class 9 Biology Question 2 of 13

Tissues: Plant and Animal Tissues — Question 2

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Question

Question 2

What is the difference between-

  1. Cell and tissue?
  2. Organ and organism?
  3. Organ and organelle?
  4. Organ and organ system?
Answer
  1. Cell and Tissue
CellTissue
Structural and functional units of living entities. They are the building blocks of life.Cluster of cells performing a specific function.
Example – Nerve cell.Example – Connective tissue.
  1. Organ and Organism
OrganOrganism
Multiple tissues make up for an organ. They perform functions within the body.Several organ systems (constituted by organs) make up for an organism.
Example - HeartExample – animals/humans
  1. Organ and Organelle
OrganOrganelle
Multiple tissues make up for an organ.They perform functions within the body.It is a portion/section of a cell that has a certain function.
Example - HeartExample – Ribosome, Lysosomes
  1. Organ and Organ System
OrganOrgan System
Multiple tissues make up for an organ. They perform functions within the body.Several organs together performing a specific life process form an organ system.
Example - HeartExample – Circulatory system