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25 Cards in this Set
- Front
- Back
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How many chromosomes do sex cells have?
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23
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What process makes sex cells?
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Meiosis
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What kind of mammal is an opossum?
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Marsupial
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What kind of fertilization do salamanders (and all amphibians) have?
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External
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What kind of fertilization do fish (mostly) have?
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External
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When does the egg become an embryo?
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About the 10th week when specialization occurs
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What is the placenta attached to ?
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The umbilical cord and uterus
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What's the tube in the penis?
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Urethra
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What stores sperm?
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Epididymus
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How many eggs does a woman make in a lifetime?
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400 mature; 1000 immature
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What gland starts ovulation?
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Pituitary
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What occurs when an egg splits in half?
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Identical Twins
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What happens when there are two eggs?
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Fraternal Twins
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How many sperm does a man make in a day?
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200 million
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Whats your #1 defense and why?
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Skin; its dead
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What type of disease is cancer?
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Noninfectious
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What type of disease is herpes?
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Infectious (and incurable)
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What causes ringworm?
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Fungus
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Where is gherrardia found?
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Water
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What do u need to have to have immunity?
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Antibodies
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What is another name for a phagocyte?
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Microphage
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What is an antigen?
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Protein marker
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What type of antigens and antibodies do B blood have?
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B antigens; A antibodies
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What does vaccine contain?
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Dead or weak pathogens
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What is a pathogen?
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Something that causes disease
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