Heart & Lung Connection Formative

Label the parts of the heart and major blood vessels.

a

b

c

d

e

f

g

h

i

left atrium

inferior vena cava

right atrium

pulmonary veins

left ventricle

aorta

right ventricle

superior vena cava

pulmonary artery

Tags

Circulatory Beginning

What type of blood vessel returns blood to the heart?

• artery

• capillary

• vein

Answer explanation

Veins are the blood vessels responsible for returning blood to the heart. Unlike arteries, which carry blood away from the heart, veins have valves that help prevent backflow, ensuring blood flows in the correct direction.

Tags

Circulatory Beginning

Which of these statements is true?

• All arteries carry oxygen-rich blood.

• All veins carry oxygen-rich blood.

• All arteries except the pulmonary artery carry oxygen-rich blood.

• All veins except the pulmonary vein carry oxygen-rich blood.

Answer explanation

The correct statement is that all arteries except the pulmonary artery carry oxygen-rich blood. The pulmonary artery is unique as it carries deoxygenated blood from the heart to the lungs.

Tags

Circulatory Approaching

A scientist takes a blood sample and measures the level of oxygen in the sample. Which of the following most likely came from the left ventricle?

• Oxygen level:
  94.9 mm Hg

• Oxygen level:
  36.3 mm Hg

Answer explanation

The left ventricle pumps oxygenated blood into the aorta. A level of 94.9 mm Hg indicates high oxygen content, typical of blood from the left ventricle, while 36.3 mm Hg suggests deoxygenated blood from the right side.

Tags

Circulatory Approaching

Reorder the following to trace the path of blood through the heart and lungs

• right ventricle

• lungs

• left ventricle

• right atrium

• left atrium

Tags

Circulatory Meeting

Label the parts of the lower respiratory system.

a

b

c

d

trachea

bronchus

alveoli

lung

Tags

Respiratory Beginning

When you breathe, your lungs take in ​ (a)   and remove ​ (b)   . 

• oxygen

• carbon dioxide

Answer explanation

When you breathe, your lungs take in oxygen, which is essential for cellular respiration, and remove carbon dioxide, a waste product of metabolism. Thus, the correct answers are oxygen and carbon dioxide.

Tags

Respiratory Beginning

Alveoli in the lungs are surrounded by which type of blood vessel?

• arteries

• capillaries

• veins

Answer explanation

Alveoli are tiny air sacs in the lungs where gas exchange occurs. They are surrounded by capillaries, which are small blood vessels that facilitate the transfer of oxygen and carbon dioxide between the air and the blood.

Tags

Respiratory Approaching

Label the names of the blood vessels and the direction of gas diffusion.

a

b

c

d

CO2

pulmonary vein

O2

pulmonary artery

Tags

Respiratory Meetin

Describe how the circulatory, respiratory, and nervous systems work together to ensure that all the cells in your body get the oxygen needed to survive.

Answer explanation

The circulatory, respiratory, and nervous systems work together to deliver oxygen by first having the respiratory system take in oxygen from the air into the lungs (ventilation). Oxygen enters the blood at the alveoli through diffusion (gas exchange). The circulatory system then transports this oxygen via the bloodstream to every cell in the body. The nervous system acts as the control center, regulating breathing and heart rate to ensure adequate oxygen supply and carbon dioxide removal, especially during changes in activity level. 

Tags

Circulatory & Respiratory Meeting/Exceeding