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HSC Biology Question Bank - New Syllabus!

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caffinatedloz:

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1) Justify the hierarchical structural organisation of organelles, cells, tissues, organs, systems and organisms. (4 marks)
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Organisms: An organism is a living being made up of systems of organs and tissues that work together.

Systems: Systems are lots of organs working together to complete processes that our body needs to do. Examples are the respiratory system which includes the lungs and trachea that allow the body to respire and the circulatory system that delivers oxygen around the body in the blood, being powered by the heart.

Organs: Organs are a collection of tissues that work together to perform steps in processes for our body such as the lungs or the heart.

Tissues: A tissue is a set of similar cells organised to perform a function. They are the waypoint between individual cells and fully formed organs.

Cells: Cells are a collection of organelles contained within a cellular membrane.

Organelles: Organelles are structures contained within a cell that allow it to grow and reproduce, as well as to perform normal processes. Examples of organelles include the mitochondria with performs cellular respiration and rough endoplasmic reticulum which synthesises proteins.

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