To carry electrical impulses around the bodies of animals.
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What is the job of a Root Hair Cell?
They increase the surface area of the root so that it can absorb water and mineral ions efficiently.
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What is the job of a Xylem Cell?
They transport water and mineral ions from the roots to the stem and leaves.
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What is the job of the Phloem Cell?
They transport food made by photosynthesis to the rest of the plant.
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What is Diffusion?
Diffusion is the spreading of particles from a higher concentration gradient to a lower concentration gradient
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What is Osmosis?
Osmosis is the movement of water from a less concentrated solution to a more concentrated solution (across a partially permeable membrane).
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What is Active Transport?
Active Transport is the movement of dissolved molecules across a cell membrane from a lower concentration to a higher concentration (against a concentration gradient)
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What is Mitosis for?
Mitosis is for the growth and repair of body cells.
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What is Meiosis for?
Meiosis is for the production of sex cells (sperm + egg)
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What are Stem Cells?
Stem Cells are unspecialised cells that are found in the human embryo and in adult bone marrow.
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What is a Tissue?
A tissue is a group of cells with similar structure and function.
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What is an Organ?
Organs are made of tissues. (EG the stomach)
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What is the job of the Digestive System?
The digestive system is responsible for changing food you eat from insoluble molecules into soluble molecules, then absorbing them into the blood.
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What is the Blood made of?
The blood is a tissue. The liquid plasma contains RBCs, White Blood Cells and Platelets.
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