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19 Cards in this Set
- Front
- Back
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Gaseous Exchange
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Is the movement of gases by diffusion between an organism and its environment across the barrier such as the alveolus wall.
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Trachea
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The windpipe leading from the back of the mouth to the bronchi, supported by c-shapped rings of cartilage.
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Bronchi
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Airways in the lungs that lead from trachea to bronchioles.
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Bronchioles
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Airways in the lungs that lead from the bronchi to the alveoil.
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Exchange Surface
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Is a specialised area that is adapted to make it easierfor molecules to cross from one side of the surface to the other.
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Alveoil
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Tiny air sacs in the lungs (Exchange Surface). Have walls one cell thick to provide a short diffusion distance.
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Mitosis
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Refers to the process of nuclear division where two genetically identical nuclei are formed from one parent cell nucleus.
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Prophase
(after interphase, before metaphase) |
Nuclear envelope breaks down. Replicated chromosomes surercoil. They become visible.
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Interphase
(first stage of the cycle, before prophase) |
DNA is replicated.
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Metaphase
(after prophase, before anaphase) |
Replicated chromosomes line up down the middle of the cell. They are attached to a spindle thread by the centromeres.
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Anaphase
(after metaphase, before telophase) |
The replicted sister chromatids are seperated. The spindle fibres shorten pulling the sister chromatids apart.
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Telophase
(after anaphase, before cytokinesis) |
The neclear envelope reforms around each set of chromosomes. The chromosomes uncoil.
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Cytokinesis
(after telophase, last stage) |
The mother cell splits into two genetically identical daughter cells.
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Meristem Cells
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Undifferentiated plant cells capable of rapid cell division.
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Tidal Volume
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The volume of air moved in and out of the lungs with each breath when you are at rest.
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Vital Capacity
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Largest volume of air that can be moved into and out of the lungs in any one breath.
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Residual Volume
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Is the volume of air that always remains in the lungs.
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Dead Space
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Is the air in the trachea, bronchi and bronchioles. No gas exchange is occuring.
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Inspiratory Reserve Volume
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1
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