Respiratory and Circulatory System Quiz

What important process happens in the netlike structure labeled A?

• Nitrogen and oxygen are exchanged.

• Carbon dioxide and oxygen are exchanged.

• Nitrogen and carbon dioxide remain constant.

• Carbon dioxide and oxygen diffuse into the blood.

What structure of the Respiratory System is labeled B in the diagram?

• Alveolus

• Bronchi

• Bronchiole

• Pharynx

Why is the lung considered as the primary organ of the respiratory system?

• Because it is the largest organ of the system.

• Because it has two parts: the right and left lungs.

• Because it is located near the middle of the chest cavity.

• Because it contains the alveoli that is responsible for gas exchange.

Which of the following statements about the human respiratory system is false?

• The bronchioles branch into bronchi.

• Alveolar ducts connect to alveolar sacs.

• When we breathe in, air travels from the pharynx to the trachea.

• Gas exchange between the lungs and blood takes place in the alveolus.

Which structure is responsible for the movement of the chest cavity during the breathing process?

• Bronchi and trachea

• Larynx and pharynx

• Nasal cavity and pharynx

• Diaphragm and rib muscle

Which is the order of airflow during inhalation?

• Nasal cavity, trachea, larynx, bronchi, bronchioles, alveoli.

• Nasal cavity, larynx, trachea, bronchi, bronchioles, alveoli.

• Nasal cavity, larynx, trachea, bronchioles, bronchi, alveoli.

• Nasal cavity, trachea, larynx, bronchi, bronchioles, alveoli.

Which of the following statements about the circulatory system is false?

• Blood in the aorta is oxygenated.

• Blood in the pulmonary vein is oxygenated.

• Blood in the pulmonary artery is oxygenated.

• Blood in the inferior vena cava is deoxygenated.

Answer explanation

Arteries transfer oxygenated blood AWAY from the heart, EXCEPT the pulmonary artery, which transfers deoxygenated blood to the LUNGS

On the other hand,

Veins transfer deoxygenated blood TOWARDS (BACK to) the heart, EXCEPT pulmonary vein, which transfers deoxygenated blood from the LUNGS

Please take note: when you read the word "pulmonary," it is always related to the Lungs. Remember the disease "pulmonia/pneumonia"

Which is the main organ of circulation?

• Blood

• Heart

• Capillary

• Blood vessels

How do arteries differ from veins?

• Arteries carry blood.

• Arteries are thin-walled and are used for gas exchange.

• Arteries have thicker wall layers to accommodate the changes in pressure from the heart.

• Arteries have thinner wall layers and valves and move blood by the action of skeletal muscle.

Which blood vessel carries blood from all parts of the body to the heart?

• Aorta

• Vena cava

• Pulmonary vein

• Pulmonary artery

Answer explanation

Automatically, you should cancel the "pulmonary vein" and "pulmonary artery" in your options. From the word itself, "pulmonary," its circulation is between heart and lungs ONLY (Pulmonary Circulation).

The question focuses on the circulation between the body and heart (Systemic Circulation). The remaining options are the Aorta and Vena cava.

Once again,

Aorta (largest artery) = AWAY

Vena Cava (largest vein) = B(V)ack