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9th grade · Science · Unit 14 of 28

Body Systems & Homeostasis

Cells, tissues, organs and systems, and how feedback keeps the body stable.

What your child practices

Practices the levels of organization in a multicellular organism (cells, tissues, organs and organ systems) and how systems work together, and how feedback loops such as sweating, shivering and insulin keep body temperature, water and blood sugar in a stable range.

New York State Learning Standards learning standard: HS-LS1-2; HS-LS1-3 · how cells, tissues, organs and systems work together, and how feedback mechanisms maintain homeostasis

How we explain it

Children can open this short lesson before they practice.

  1. Similar cells form a tissue; tissues form organs; organs form organ systems.
  2. Feedback loops keep the body stable: sweating cools you, shivering warms you.
  3. Insulin lowers blood sugar after a meal.

Example: How does shivering help when you are cold? Shivering is quick muscle movement. Moving muscles release heat. Answer: it makes heat with quick muscle movements

Body Systems & Homeostasis in New York

In the New York State Learning Standards, this is unit 14 of 28 in 9th grade Science, after Ecosystem Dynamics and before DNA, Proteins & Traits.

Gradelings describes a child's practice on this unit as Beginning, Approaching, Meeting or Exceeding (Four practice steps). That reflects practice, not a report-card mark: the teacher decides the mark.

Source: New York State Education Department (NYSED)

Sample questions

A taste of this unit. In the app, questions change every time and get easier or harder to match your child.

  1. Question 1

    A group of similar cells working together is a…

    • organ
    • tissue
    • organ system
    • organism

  2. Question 2

    Red blood cells carry…

    • nerve signals
    • oxygen
    • food to the stomach
    • hormones only

  3. Question 3

    When you get too hot, your body cools down by…

    • making goose bumps
    • sweating
    • holding your breath
    • shivering

  4. Question 4

    The heart, blood vessels and blood form the…

    • skeletal system
    • digestive system
    • circulatory system
    • nervous system

  5. Question 5

    When you are short of water, your kidneys…

    • save water by making less urine
    • stop filtering blood
    • make you sweat more
    • make more urine

  6. Question 6

    A student measures pulse at rest, after jumping jacks, and every minute after. The data will most likely show the pulse…

    • falling during exercise
    • never changing
    • rising, then returning toward the resting rate
    • rising for hours

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