Unit 5 Lesson 2 Quiz

Plants and animals have highly organized systems. Which list shows the level of complexity, from simplest to most complex?

• organism - organ - organ system

• organs - organ system - organism

• organ system - organism - organs

• organs - organism - organ system

The arrow is pointing at a digestive organ. What happens when food reaches this organ?

• Digestive juices mix with the food

• Food is stored, but no digestion occurs

• THe food is moved into the small intestine

• The food is completely digested and absorbed into the bloodstream

Body systems work together to supply cells with nutrients. Which list shows the path nutrients take in the body?

• 1. air

  2. respiratory system

  3. digestive system

  4. cells

• 1. air

  2. respiratory system

  3. circulatory system

  4. cells

• 1. food

  2. digestive system

  3. respiratory system

  4. cells

• 1. food

  2. digestive system

  3. circulatory system

  4. cells

Human organs and organ systems each have specific functions, or jobs. Which pairing matches an organ with its main function?

• biceps: getting rid of waste

• stomach: balance

• lung: breaking down food

• vein: transporting blood

Which body system works to eliminate waste in your body?

• excretory system

• respiratory system

• circulatory system

• digestive system

What organ helps you fully digest your food?

• Heart

• Lungs

• Small Intestine

• Liver

Which group of organs make up the respiratory system?

• lungs, heart, trachea

• Heart, trachea, arteries

• Lungs, trachea, diapragm

• Heart, diaphragm, trachea

Which of these organs is NOT part of the excretory system?

• lungs

• skin

• kidneys

• heart

A human blood vessel is pictured. What is the purpose of blood in the circulatory system?

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When we exercise, we start to breath harder. Also, our heart beats faster. Why does this happen? (Use complete sentences)

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