Which best describes the purpose of the cardiovascular system?

It delivers blood to the body’s tissues

Which best describes the role of the respiratory system?

It helps people breathe in oxygen and out carbon dioxide

Why is the digestive system important?

It provides nutrients that cells need to produce energy.

How is it possible for single-celled organisms to survive?

They have all of their needs met within one cell.

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Structures and Functions 5th Grade

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Human Body Systems

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Questions 16

Answers

1
Fish are multi-celled organisms. What would likely happen if their cells did not function ?
decrease in size
die
thrive
increase in size
2
Which best describes the purpose of the cardiovascular system?
It delivers blood to the body’s tissues
It supplies oxygen to the body.
It supplies stability to the skeleton
It delivers food to power the body.
3
Which of these is a structure that is present in all organisms?
cell
stomach
tissue
brain
4
Which are parts of the digestive system?
mouth, teeth
mouth, lungs
brain, mouth
5
Which best describes the role of the respiratory system?
It helps people transport blood
It helps people eat and digest food
It helps people breathe in oxygen and out carbon dioxide
It helps people stand upright
6
Which system is most closely associated with the brain?
circulatory
muscular
respirtatory
nervous
7
Which is part of the digestive system?
heart
stomach
kidney
brain
8
A unicellular organism is best described as being
a complex organism
an organism with different types of tissues
an organism with specialized cells
a microorganism
9
Why is the digestive system important?
It transports blood that cells need
It carries carbon dioxide and oxygen away from the body.
It provides nutrients that cells need to produce energy.
It provides oxygen that cells need
10
This organism is capable of surviving as a single cell.
bacteria
insect
flower
mushroom
11
What are the three types of muscle?
skeletal
nervous
cardiac
smooth
12
Which system of the human body does the heart belong?
respiratory
digestive
cadiovascular
nervous
13
Which two systems work together to help a person stand erect?
skeletal and respiratory
skeletal and cardiovascular
skeletal and digestive
skeletal and muscular
14
What is the only voluntary muscle?
smooth
skeletal
respiratory
cardiac
15
How is it possible for single-celled organisms to survive?
They are small and can easily avoid predators.
They depend on other cells to obtain food and water
They have all of their needs met within one cell.
They have adapted to live only in specific environments.
16
Which two body systems work together to take in oxygen and release carbon dioxide?
circulatory and respiratory
respiratory and muscular
digestive and circulatory
muscular and skeletal

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