This definitions covers Key Definitions within Tissues, Organs and Organ Systems for GCSE Biology. Organizational hierarchy from cells to organ systems, tissue types in plants and animals, structure-function relationships, and system interactions It is section 8 of 14 in this topic. Make sure you can use the exact wording confidently, because definition marks are often lost through vague language.
Topic position
Section 8 of 14
Practice
18 questions
Recall
22 flashcards
Key Definitions
Cell: The basic structural and functional unit of all living organisms; the smallest unit that can carry out life processes independently.
Tissue: A group of similar cells that work together to carry out a particular function.
Organ: A structure made up of different tissues working together to perform a specific function.
Organ system: A group of organs working together to carry out a major bodily function.
Epithelial tissue: A tissue type consisting of tightly packed cells that line surfaces and cavities; functions in protection, absorption, and secretion.
Organism: A living individual in which all organ systems work together to sustain life.