Breathe Easy
Which Structure is known as the 'voice box'?
Larynx
Which gas is transported by hemoglobin?
Oxygen
How many chambers does the human heart have?
Which component of blood is non-cellular?
Plasma
What is the process of blood clotting called?
Hemostasis
What is the name of the circuit between the heart and lungs?
Pulmonary circulation
The diaphragm contracts during inhalation. (True/False)
TRUE
Where does gas exchange occur in the lungs?
Alveoli
What type of blood do pulmonary arteries carry?
Deoxygenated blood
Which side of the heart pumps deoxygenated blood?
Right
What is the function of leukocytes?
Defend the body against infection
What is the first step of hemostasis?
Vascular spasm
Which blood vessels allow gas exchange with tissues?
Capillaries
The respiratory system removes carbon dioxide from the body. (True/False)
TRUE
This happens to the diaphragm during inspiration.
It contracts and moves downward.
What process allows oxygen to move from the blood into the alveoli?
Diffusion
Which chamber pumps oxygenated blood to the body?
Left ventricle
Which blood cell lacks a nucleus?
Erythrocyte (red blood cell)
Which component of blood helps in clot formation?
Platelets
Which vessels carry blood back to the heart?
Veins
How do the respiratory and circulatory systems work together?
They deliver oxygen to and remove carbon dioxide from body tissues.
What is the function opf the epiglottis?
Prevents food from entering the airway
Where does internal respiration occur?
In the tissue cells
Which blood vessel carries blood away from the heart?
Arteries
What percentage of blood is plasma?
About 55%
What protein forms the mesh of a blood clot?
Fibrin
Which side of the heart handles oxygenated blood?
Left side
What might happen if platelets didn’t function properly?
Blood would not clot properly, leading to excessive bleeding.
Which part of the respiratory system warms, moistens, and filters the air?
Nasal Cavity
Which gas diffuses from tissues into blood during internal respiration?
Carbon Dioxide (CO₂)
Which valve separates the left atrium and the left ventricle?
Mitral Valve
What is the lifespan of a red blood cell?
About 120 days
What happens if hemostasis fails to occur?
Excessive bleeding (hemorrhage)
What is the function of systemic circulation?
Delivers oxygenated blood to body tissues and returns deoxygenated blood to the heart
Why is diffusion essential to respiration and circulation?
It allows gases to move between the lungs, blood, and tissues.