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21 Cards in this Set
- Front
- Back
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What are the needs of cells?
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oxygen
excretion reproduction growth and repair respiration nutrients |
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Unicellular organism
(definition + few facts) |
a living thing that is made up of one cell
Entire ‘body‛ is in direct contact with their environment (which is usually water). nutrients (water, food, oxygen) can reach every part of their ‘body‛ very quickly…wastes are also moved quickly into the surrounding water….. |
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Multicellular organism
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a living thing that is made up of a group of cells working together
reliant on body systems to supply nutrients and excrete waste |
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Tissues
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Similar cells that are grouped together
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Organs
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a collection of tissues serving a specific job eg. heart
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Asexual reproduction
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reproduction where only one parent is needed. The offspring are genetically identical to the parent.
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Mitosis
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a single cell reproduces itself by splitting into two
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Meiosis
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cell division that produces reproductive cells in sexually reproducing organisms
the cell divides into four |
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Gamete
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A sex cell used in sexual reproduction.
Human gamete has 23 chromosomes. |
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Cervix
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This is where the end of the vagina
meets the start of the uterus. Helps to draw sperm into uterus and fallopion tubes |
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Vagina
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The muscular tube that is the
entry point for sperm from the male. |
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Fallopian Tubes
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Tube that joins the ovary to the
uterus. An ovum (egg) travels along the tube each month. If a sperm is present, the egg is fertilised here |
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Uterus
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Hollow muscular chamber in which
the fertilised ovum grows to become a baby. |
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Urethra
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Tube that carries urine from the
bladder to the outside world. It is also the tube through which the sperm is introduced into the vagina of a female. |
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Ovaries
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This is the organ in which the ova
(eggs) mature. It is also where female hormones (particularly oestrogen) are produced. |
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Bladder
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Urine formed by the kidneys is
stored here before leaving the body through the urethra. |
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Penis
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The external organ of reproduction in
males. It consists of muscle that engorges with blood and helps passes the semen through the penis. Also a pathway for urine from the bladder. |
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Prostrate Gland
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Produces a fluid (part of the semen) that
helps the sperm survive its journey into the vagina, uterus and fallopian tubes. |
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Cowpers Gland and Seminal Vesicles
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Produces secretions which add nutrient
energy and neutralizes the acidic nature of the vagina |
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Testis
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This is the production site for sperm and
for the male hormone called testosterone |
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Vas Deferens
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Carries sperm from the testis
(epididymis) to the urethra (inside the penis). Storage of sperm |
