Question

cer assignment: how human body systems interact
background: the human body is made up of multiple systems that work together to maintain life. for example, the respiratory system brings in oxygen, the circulatory system transports it, and the muscular system uses it for energy.
your task: you will write a cer (claim–evidence–reasoning) response explaining how two or more human body systems interact to perform a specific function.
prompt: how do human body systems interact to help maintain homeostasis and support life?
steps:

1. claim (c): write one clear sentence that answers the prompt. example starter: “the respiratory and circulatory systems work together to…”
2. evidence (e): provide 2–3 pieces of evidence from class, readings, or diagrams that support your claim. example: “the respiratory system brings oxygen into the lungs, and the circulatory system transports oxygen - rich blood to the body’s cells.”
3. reasoning (r): explain how your evidence supports your claim. example: “because cells need oxygen to make energy, the interaction between these two systems ensures that the body can survive and maintain balance.”

student workspace
claim: ____________
evidence:

1. ____________
2. ____________
3. ____________

reasoning: ____________
success criteria checklist
☑ my claim directly answers the prompt.
☑ my evidence includes at least 2 accurate facts about body system interactions.
☑ my reasoning explains how the evidence connects to the claim.

Explanation:

Claim:

The respiratory, circulatory, and muscular systems work together to maintain homeostasis and support life by providing oxygen for energy production.

Evidence:

1. The respiratory system inhales oxygen into the lungs.
2. The circulatory system transports oxygen - rich blood to muscle cells.
3. The muscular system uses oxygen to produce energy for movement.

Reasoning:

Cells in the muscular system need oxygen to perform cellular respiration and generate energy (in the form of ATP). The respiratory system's role in taking in oxygen and the circulatory system's role in delivering it to the muscles ensure that the muscular system can function. This interaction between the three systems allows the body to move, maintain temperature (through muscle activity), and carry out other vital processes, thus supporting homeostasis and life.

Answer:

Claim:

The respiratory, circulatory, and muscular systems work together to maintain homeostasis and support life by providing oxygen for energy production.

Evidence:

1. The respiratory system inhales oxygen into the lungs.
2. The circulatory system transports oxygen - rich blood to muscle cells.
3. The muscular system uses oxygen to produce energy for movement.

Reasoning:

Cells in the muscular system need oxygen to perform cellular respiration and generate energy (in the form of ATP). The respiratory system's role in taking in oxygen and the circulatory system's role in delivering it to the muscles ensure that the muscular system can function. This interaction between the three systems allows the body to move, maintain temperature (through muscle activity), and carry out other vital processes, thus supporting homeostasis and life.