Biology 2A - Levels Of Organisation

nucleus

controls the cell

cell membrane

controls what goes into and out of the cell

mitochondria

where respiration occurs, to produce energy

cytoplasm

where reactions occur

ribosomes

where proteinsynthesis occurs

unicellular organism

An organism that contains one cell, for example bacteria.

multicellular organism

An organism that contains lots of cells, for example a human.

levels of organisation within organisms (smallest to largest)

organelle, cell, tissue, organ, organ system, organism

examples of the levels of organisation within humans (smallest to largest)

nucleus, muscle cell, muscle, heart, circulatory system, human

9 organs of the human body

brain, lungs, heart, liver, stomach, pancreas, kidney, large intestine, small intestine

respiratory system

The system which takes in the oxygen and glucose through the chemical reaction of respiration, removing the carbon dioxide and water, producing energy.

respiration equation

oxygen + glucose => carbon dioxide + water + energy