The Human Body

Which phrase defines the term homeostasis?

• a division of cells that make up the human body

• regulation of the external environment

• maintenance of stable conditions inside the body

• removal of waste

Answer explanation

The human body cannot control the external environment (like the weather). Instead, the body responds to changes in the the external environment to keep the conditions inside the body stable.

What is the function of the skeletal system?

• break down food into nutrients

• fight viruses and bacteria

• support and protect the body and allow for movement

• control the other organ systems

What is the function of the nervous system?

• growth and development

• fight disease

• digestion

• receive and respond to information about the human body and the environment

What organ system does the brain belong to?

• the reproductive system

• the immune system

• the digestive system

• the nervous system

What is the function of the respiratory system?

• maintain water balance

• take in oxygen and eliminate carbon dioxide

• fight infection

• break down food into smaller nutrients

What is the functionof the circulatory system?

• deliver nutrients to cells and remove waste

• break down nutrients in food

• control the other organ systems

• support and protect the body

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How does the respiratory and circulatory systems work together during exercise?

• the body makes more blood cells

• the lungs make more oxygen and is delivered to cells through the blood

• decreased blood flow provides more nutrients

• increase breathing rate so more oxygen can be dilivered to the cells through the blood

Answer explanation

When you exercise, your muscle cells need more oxygen. Your breathing rate increases so your lungs can take in more oxygen. The circulatory system delivers this oxygen to the cells through the blood.

What is the function of the digestive system?

• remove waste

• break down food into smaller nutrients

• transport nutrients to the body

• control the other body systems

Answer explanation

excretory system: removes waste

digestive system: break down food into nutrients

circulatory system: transports nutrients to the body

nervous system: control the other body systems

What is the function of the excretory system?

• get rid of waste and control water balnace in the body

• deliver nutrients to the body

• control the other body systems

• helo the body move

How do the body systems work together to regulate body temperature?

• the digestive system stimulates the circulatory system

• the nervous system stimulates the excretory system to increase sweat production

• the muscular system stimulates the excretory system causing you to sweat

• the reproductive system stimulates the immune system causing you to sweat

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