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Science

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    Science Review
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  • a male sex cell
    sperm
  •  10
  • the female reproductive organ that connects the outside of the body to the uterus
    vagina
  •  10
  • the primary male reproductive organs which produce sperm cells and testosterone
    testes
  •  15
  • the male reproductive organ that transfers sperm to a female and carries urine out of the body
    penis
  •  15
  • a sex cell produced by a female
    egg
  •  15
  • in the female reproductive system of animals, an organ that produces eggs
    ovary
  •  15
  • in female placenta mammals, the hollow, muscular organ in which an embryo
    uterus
  •  15
  • in humans, a developing individual from first division after fertilization throughout the 10th week of pregnancy
    embryo
  •  15
  • the partly fetal and partly maternal organ by which materials are exchanged between a fetus and a mother
    placenta
  •  15
  • a rope like structure through which blood vessels pass and by which a developing mammal is connected to the placenta
    umbilical cord
  •  15
  • a developing human from the end of the 10th week of pregnancy until birth
    fetus
  •  15
  • a microorganism, another organism, a virus, or a protein that causes diseases.
    pathogen
  •  15
  • the cells and tissues that recognize and attack foreign substances in the body.
    Immune system
  •  15
  • an immune system cell that engulfs pathogens and other materials.
    macrophage
  •  15
  • an immune system cell that coordinates the immune system and attacks many infected cells
    T cell
  •  15
  • a white blood cell that makes antibodies
    B cell
  •  20