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?

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