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Arteries

• Blood vessel that carries oxygen rich blood away from the heart and to the body parts.

• Carries oxygen poor blood (with carbon dioxide) back to the heart to be pumped out to the lungs.

• Hollow, muscular organ that pumps blood throughout the body.

•  Small blood vessels where materials are exchanged between the blood and the body’s cells (oxygen and carbon dioxide)

Which organ is part of the peripheral nervous system?

• Brain

• Heart

• Nerves

• Hair

Muscular tube connecting the mouth to the stomach

• Esophagus

• Small Intestine

• Phagocytes

• Spinal Cord

Cartilage

• Connective tissue that is more flexible than bones

• Produces blood cells

• Found only in the heart

• Large dome-shaped muscle used in breathing

How do your respiratory and circulatory systems attempt to maintain homeostasis during exercise? (SC.6.L.14.5)

• Your body produces more red blood cells to help provide energy to cells.

• Your lungs produce more oxygen which is then delivered to the cells through the blood.

• You experience an increase in blood flow which provides nutrients to cells to increase energy and remove wastes.

• You experience an increase in breathing rate to obtain more oxygen which is delivered to cells through the blood stream.

Food gives the body energy, which helps the body maintain homeostasis. In the morning, an athlete eats a nutritious breakfast to get energy to exercise. What are the main organ systems involved in the process of food from the athlete’s breakfast being broken down into nutrients and then delivered to the cells? (SC.6.L.14.5)

• Digestive and excretory systems.

• Digestive and circulatory systems.

• Nervous and excretory systems.

• Respiratory and circulatory systems

Tags

NGSS.MS-LS1-3

The skin helps regulate body temperature by perspiration, which allows excess heat to leave the body. If you lost the ability to sweat, what could happen to you if you were running a marathon? (SC.6.L.14.5)

• The body would overheat.

• The body would react slowly.

• The body would start to shiver.

• The body would need more energy.

In order to maintain homeostasis, the systems of the human body work together to keep a constant internal temperature. Which of the following best describes how the human body responds in a cold environment? (SC.6.L.14.5)

• The digestive system produces more hormones to warm the body.

• The nervous system signals the muscles of the muscular system to contract and warm the body.

• The circulatory system delivers less carbon dioxide to the muscular system, resulting in stiffening of the muscles.

• The skeletal system produces more blood cells that circulate through the blood vessels, increasing the warmth of the body.

Tags

NGSS.MS-LS1-3

You and your classmate are discussing different organs and organ systems within the human body. Your friend states that the excretory system includes multiple organs, and one of those organs is the lungs. You argue that the lungs can’t possibly be in the excretory system since it is part of the respiratory system. Which of the following choices would be the best statement that your friend would use to justify why the lungs help keep homeostasis for the excretory system? (SC.6.L.14.5)

• The lungs bring in oxygen, which is a vital gas to keep our cells alive and healthy.

• The lungs exhale carbon dioxide, which is a waste gas and needs to be removed from the body.

• The lungs provide cells with a gas that is important for the cell process of respiration.

• The lungs remove waste in the forms of solids, liquids, and gases that could be harmful for the body.

Naomi was looking at cells with a microscope. She knows the cells are classified as either plant cells or animal cells. How can she tell if these cells are plant cells?

• She should look for a large nucleus in the center of the cells.

• She should look for cytoplasm that is filled with organelles.

• She should look for a cell membrane surrounding the entire cell.

• She should look for a cell wall outside of the cell membrane.