Human Body Systems

When blood that is high in carbon dioxide exits the heart, it immediately enters which body system?

• nervous

• respiratory

• digestive

• muscular

Miranda learned how the human body carries out life functions. Which is the MOST basic level of organization in the human body?

• an organ

• a system

• a tissue

• a cell

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NGSS.MS-LS1-3

NGSS.MS-LS1-1

The muscles exert forces on the body and enable movement by

• pushing on tendons

• squeezing ligaments

• stimulating the spinal cord

• pulling on bones

The heart, blood vessels, kidneys, and bladder working together are BEST described as

• a cell

• a tissue

• an organism

• a system

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NGSS.MS-LS1-3

The walls of an artery are thicker and more elastic than the walls of a vein.

Why is it important for the walls of an artery to be thicker and more elastic?

• to reduce cholesterol levels in the blood

• to resist the higher pressure from the blood

• to stop the blood from going into the capillaries

• to prevent blood from flowing backward in the vessels

In humans, digestion begins in the mouth. The complete process of digestion occurs with the help of many different parts of the body. Which term BEST identifies the parts of the body that carry out the function of digestion?

• an organ

• an organism

• a system

• a tissue

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NGSS.MS-LS1-3

From simplest to most complicated, how are multicellular organisms organized?

• organ system, organ, cell, tissue

• organ, tissue, cell, organ system

• tissue, cell, organ system, organ

• cell, tissue, organ, organ system

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NGSS.MS-LS1-3

The human body has different levels of organization. In the structural organization of the central nervous system, which is an organ?

• brain

• grey matter

• nerve

• neuron

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NGSS.MS-LS1-3

Human organ systems work together in many ways. Which statement accurately explains the relationship between two body systems?

• the excretory system regulates the temperature of the integumentary system

• the skeletal system delivers nutrients absorbed by the endocrine system

• the digestive system delivers oxygen absorbed by the respiratory system

• the nervous system regulates the movement of the muscular system

Which of these indicates a physical change that occurs during the process of digestion?

• the addition of acids to create a ball of food

• the secretion of pepsin to change proteins to peptides

• the breakdown of food substances by digestive juices

• the squeezing of food through the intestines