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4th Grade Natural Unit 1 Review

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  • What is the system that moves blood around the body?
    Circulatory system
  • Can you name 4 parts of the respiratory system?
    nose, mouth, trachea, bronchi, lungs, diaphragm, alveoli, bronchiole, capillaries
  • What is the difference between veins and arteries?
    Arteries carry oxygenated blood to the body. Veins carry blood back to the heart.
  • Do males and females have the same reproductive systems?
    No!
  • What does blood do? Why is it important?
    It carries oxygen, water and other nutrients to all the cells in the human body.
  • Name four parts of the female reproductive system.
    ovaries, uterus, Fallopian tubes, vulva, vagina
  • What are these?
    Bronchioles, alveoli, capillaries
  • What are the four chambers of the heart? Can you explain how blood is pumped?
    Deoxygenated blood enters through the right atrium, passes through the right ventricle, pumps into the lungs, then the oxygenated blood enters the left atrium..
  • What does respiration mean?
    Respiration is another word for breathing.
  • What is the female sex cell called? And the male sex cell?
    Female - ova/ovum ; Male - sperm
  • Name four parts of the male reproductive system.
    urethra, sperm ducts, scrotum, penis, testicles
  • What are the main organs in the circulatory system?
    The heart, blood vessels (veins, arteries and capillaries)
  • What is the bag of liquid that protects the developing baby called?
    Amniotic sac
  • How many months does pregnancy last in human beings?
    9
  • At the beginning of the pregnancy, the baby is called an e_____ for the first 6-8 weeks and then it is called a f_____.
    Embryo, foetus
  • What is a belly button?
    A scar from where the umbilical cord is cut
  • When we breath, what goes in and what comes out?
    Oxygen in, carbon dioxide out
  • Where does a baby develop before it is born?
    Uterus
  • Give five examples of our body systems.
    locomotor system, nervous system, digestive system, excretory system, circulatory system, respiratory system, male/female reproductive system
  • What is the muscle below the lungs called?
    diaphragm