Moving Materials Practice

Which of the following systems transports oxygen throughout the body?

• Respiratory

• Digestive

• Nervous

• Circulatory

Answer explanation

The circulatory system is responsible for transporting oxygen from the lungs to the rest of the body through the blood. The respiratory system brings oxygen into the body, but it is the circulatory system that distributes it.

How does oxygen enter the blood in the lungs?

• Through bronchioles

• By transferring across alveoli and capillaries

• By flowing directly through the trachea

• From the mouth directly to the bloodstream

Answer explanation

Oxygen enters the blood in the lungs by transferring across the alveoli and capillaries. This process allows oxygen to diffuse from the air in the alveoli into the bloodstream, where it binds to hemoglobin in red blood cells.

What role do blood vessels play in the body’s transportation system?

• They support the body’s organs

• They carry blood throughout the body

• They produce oxygen

• They control muscle movements

Answer explanation

Blood vessels are essential for the body's transportation system as they carry blood throughout the body, delivering oxygen and nutrients to tissues and organs, and removing waste products.

Tags

NGSS.MS-LS2-3

Which of these best describes how the diaphragm helps in breathing?

• It creates sound when we talk

• It adjusts the pressure in the chest, helping air flow in and out

• It transports air to the lungs

• It absorbs oxygen

Answer explanation

The diaphragm is a muscle that contracts and relaxes to change the pressure in the chest cavity, allowing air to flow in during inhalation and out during exhalation, making it essential for breathing.

True or False: The trachea is part of the respiratory system and helps move air toward the lungs.

• True

• Flase

Answer explanation

True. The trachea, also known as the windpipe, is a crucial part of the respiratory system that conducts air from the larynx to the lungs, facilitating the process of breathing.

True or False: Capillaries connect the respiratory and circulatory systems during gas exchange.

• True

• False

Answer explanation

True. Capillaries are tiny blood vessels that connect the circulatory system to the alveoli in the lungs, facilitating gas exchange by allowing oxygen to enter the blood and carbon dioxide to be expelled.

True or False: Blood vessels carry food and oxygen to body cells.

• True

• False

Answer explanation

False. Blood vessels primarily carry blood, which transports nutrients and oxygen to body cells, but they do not directly carry food. Food is digested and absorbed into the bloodstream.

True or False: The diaphragm controls oxygen levels in the bloodstream.

• True

• Flase

Answer explanation

False. The diaphragm is a muscle that aids in breathing by contracting and relaxing, but it does not directly control oxygen levels in the bloodstream. Oxygen levels are regulated by the respiratory and circulatory systems.

Oxygen moves from the respiratory system to the circulatory system when it transfers from the ___________ in the lungs to the ___________ in the bloodstream.

• alveoli - capillaries

• capillaries - alveoli

Answer explanation

Oxygen moves from the alveoli, tiny air sacs in the lungs, into the capillaries, which are small blood vessels in the bloodstream. This transfer is essential for oxygenating the blood.

Tags

NGSS.HS-LS2-3

Blood moves away from the heart through ___________, while ___________ bring blood back to the heart.

• arteries - veins

• veins - capillaries

• capillaries - artieries

Answer explanation

Blood moves away from the heart through arteries, which carry oxygenated blood, while veins bring deoxygenated blood back to the heart. Therefore, the correct answer is arteries - veins.