Human Body Systems Quiz

The human body is organized into organs that carry out different functions. Which organ or organs filter blood to remove excess waste and water?

• 
  

  A.

  heart

• B.

  kidneys

• C.

  lungs

• D.

  stomach

Unlike plants, animals cannot make their own food, so they must find and consume other things to survive. How do animals use the food they obtain? Choose the three that apply.

• A.

  energy for body warmth

• B.

  growth and body repair

• C.

  ability to adapt

• D.

  develop instincts

• 
  

  E.

  energy for motion

Look at the diagram. Organisms obtain nutrients in different ways, and they use these nutrients before releasing wastes back into the environment. What is this movement of materials through organisms and back to the environment called?

• A.

  nitrogen cycle

• B.

  energy flow through the ecosystem

• C.

  nutrient cycle

• D.

  carbon flow in the ecosystem

Animals have sense receptors that specialize in different information, and they use their senses to guide their actions. What part of the body processes these signals from the senses?

• • A.

    the spinal cord

• B.

  the skin

• C.

  the brain

• D.

  the nerves

The respiratory system is crucial for gas exchange in the body. Which organ is primarily responsible for the exchange of oxygen and carbon dioxide?

• A.

  trachea

• B.

  lungs

• D.

  heart

• C.

  diaphragm

In animals, the nervous system plays a vital role in responding to stimuli. What is the main component of the nervous system that transmits signals throughout the body?

• C.

  hormones

• B.

  muscles

• A.

  neurons

• D.

  organs

It works with the bones to help the body to move.

• Skeletal system

• Digestive system

• Muscular system

This system controls all body functions

• Circulatory system

• Nervous system

• Muscular system

What body system breaks down food into simpler substances that can be used by the body?

• Digestive system

• Muscular system

• Skeletal system

It protects some of the organs and gives the body support and shape.

• Digestive system

• Respiratory system

• Skeletal system