Human Body Systems

The heart is a muscular structure that pumps blood through blood vessels to all parts of the body. Which level of organization do heart, blood, and blood vessels together represent?

• Cell

• Organ

• System

• Tissue

Tags

NGSS.MS-LS1-3

An organ is made up of groups of tissues that work together to perform a function. Which example represents an organ?

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The table lists some characteristics of osteoblasts.

Which level of structural organization best describes an osteoblast?

• cell

• tissue

• organ

• systems

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

A student listed some functions of an organ.

To which system does the organ belong?

• Digestive system

• Excretory system

• Nervous system

• Respiratory system

Tags

NGSS.MS-LS1-3

The human body is divided into specific levels of organization. What is the correct sequence of the levels of organization, from the least to the most complex?

• cells, tissues, systems, organs

  
  

• cells, tissues, organs, systems

  
  

• organs, cells, tissues, systems

  
  

• systems, organs, tissues, cells

  
  

What is the primary function of the circulatory system?

• to break down food within the body

  
  

• to produce blood cells for use throughout the body

  
  

• to send signals throughout the body

  
  

• to transport blood within the body

  
  

To which organ system do these organs belong?

• circulatory

• digestive

• excretory

• integumentary

Which body systems work together to make sure that oxygen reaches the cells from the outside environment and carbon dioxide is removed from the body?

• The respiratory system and the circulatory system.
• The digestive system and the nervous system.
• The muscular system and the skeletal system.
• The endocrine system and the lymphatic system.

What level of structure is represented by the diagram?

• Tissue

• Organ

• System

• Cell

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

Which organ system provides a point of attachment for muscles?

• Skeletal system
• Nervous system
• Digestive system
• Endocrine system