What is the difference between an artery and a vein?

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1:Lungs function as part of the __________ system and the __________ system.
circulatory; endocrine
digestive; musculoskeletal
excretory; respiratory
immune; reproductive
2:What is the difference between an artery and a vein?
An artery carries blood away from the heart; a vein carries blood to the heart.
An artery is responsible for carrying blood; a vein is responsible for gas exchange.
An artery is responsible for gas exchange; a vein is responsible for carrying blood.
An artery carries blood to the heart; a vein carries blood away from the heart.
3:The __________ system is made up of the nose, pharynx, trachea, lungs, bronchi, and alveoli.
circulatory
endocrine
immune
respiratory
4:Read the following summary, which describes blood flow and heart output in space. Then, answer the question.
The heart doesn’t have to do as much work to pump blood when in orbit. After only one day beyond Earth’s gravity, astronauts have a lower blood volume. They can lose as much as 20 percent of their blood volume while on a space mission. Since the body has less blood to push around and the heart is pushing more blood with each beat, an astronaut’s heart rate also slows down to compensate.
What process is being described?
Breathing
Excretion
Homeostasis
Respiration
5:The __________ system is responsible for moving blood cells throughout the body.
circulatory
endocrine
immune
respiratory

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