Human Body Systems

How would you demonstrate your understanding of F and B working to carry out life processes?

• F are the lungs to take in oxygen and B are chloroplasts for making energy.

• F are the lungs to take in oxygen and B are mitochondria for making glucose.

• F are the lungs to take in oxygen and B are mitochondria for making glucose.

• F are the lungs to take in oxygen and B are mitochondria for breaking down carbon dioxide.

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NGSS.MS-LS1-1

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Which of the following shows the correct organization in the human body, from simple to most complex?

• nervous system-nerve cell-nerve tissue-spinal cord

• nerve cell-nerve tissue-spinal cord -nervous system

• spinal cord-nerve tissue-nervous system-nerve cell

• nerve cell- spinal cord-nerve tissue-nervous system

Using your understanding of how body systems work together, construct an argument for how the respiratory system depends on the cardiovascular system to function properly.

• The gas that must be transported through the blood is called carbon dioxide. The respiratory system takes in this gas and relies on the circulatory system to deliver this gas to all cells.

• The gas that must be transported through the blood is called oxygen. The respiratory system takes in this gas and relies on the circulatory system to deliver this gas to all cells.

• The gas that must be transported through the blood is called oxygen. The cardiovascular system takes in this gas and relies on the respiratory system to deliver this gas to all cells.

• The gas that must be transported through the blood is called carbon dioxide. The excretory system takes in this gas and relies on the circulatory system to deliver this gas to all cells.

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NGSS.MS-LS1-3

A student is building a model of how cells are organized. The student drew a picture of the model. Which segment of his model represents the organ level of cellular organization?

• Segment 1

• Segment 2

• Segment 3

• Segment 4

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NGSS.MS-LS1-3

As cells carry out life processes they produce waste. These wastes are removed from organs and released into the blood for removal from the body. Which systems work closely together to carry out this life process?

• pathogens; circulatory

• respiratory; digestive

• urinary; immune

• cardiovascular; excretory

A teacher displayed the two models to a class of 7th grade science students for a group discussion. The teacher asked the students to decide which model was the best representation of how the human body is organized from cell to organism. According to what the teacher asked, which student is correct?

• 
• Student B: I think Model B is the best representation because it shows a cell, a tissue, an organ, and an organ system.

• Student C: I think that neither Model A nor Model B is the best representation because they do not show an organism.

• Student D: I think that both Model A and Model B are the best representation because both show a cell, a tissue, an organ, and an organ system.

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NGSS.MS-LS1-3

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Your teacher gives you models of a stomach, a heart, a red blood cell, and of the muscular system. Which statement below explains which model is the most complex of the models your teacher gave you?

• The model of the stomach is the most complex because it has the important job of breaking down food.

• The model of the red blood cell is most complex because it has the important job of carrying oxygen to all the cells in the body.

• The model of the heart is the most complex because it is an organ made of many cells and various tissues.

• The model of the muscular system is the most complex because it is made of many organs, tissues and cells working together to complete a function for the body.

Based on the model, a failure at level four of organization would most directly affect the function at what level of organization in a complex organism?

• System level

• Organ level

• Tissue level

• Cell level

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NGSS.MS-LS1-3

What system works most directly with the nervous and skeletal systems to move the body?

• immune

• muscular

• excretory

• cardiovascular

The diagram below shows structures called intestinal villi, which are small projections that line the inside of the small intestine. After food is chewed and swallowed, it enters the stomach, where it is broken up further and digested. Then the food enters the small intestine. The small intestine is the portion of the digestive system where digested food is absorbed by the body, and this happens through the blood vessels in the villi.

What system works closely with the digestive system to deliver nutrients throughout the body?

• The cardiovascular system because it delivers nutrients to all parts of the body.

• The nervous system because it regulates all of digestion.

• The digestive system to break down food and carry out respiration.

• The muscular system because peristalsis would not be possible without muscles.

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