Breathing & the Lungs
When the diaphragm contracts, air moves into the lungs in this process.
Answer: What is inhaling (inhalation)?
These blood vessels carry blood back toward the heart.
Answer: What are veins?
This fluid moves through lymph vessels and helps return excess tissue fluid to the bloodstream.
Answer: What is lymph?
These two systems work together so you can breathe.
Answer: What are the respiratory and muscular systems?
Blood that carries oxygen is usually this color.
Answer: What is bright red?
These tiny air sacs in the lungs allow oxygen and carbon dioxide to exchange with the blood.
Answer: What are alveoli?
These vessels carry blood away from the heart.
Answer: What are arteries?
These structures filter harmful substances and dead cells from lymph.
Answer: What are lymph nodes?
This system controls breathing rate and heart rate.
Answer: What is the nervous system?
This gas leaves the body when you exhale.
Answer: What is carbon dioxide?
This tube carries air from the throat down toward the lungs.
Answer: What is the trachea?
These extremely small vessels connect arteries and veins and allow substances to pass between blood and tissues.
Answer: What are capillaries?
Unlike the circulatory system, the lymphatic system does not have this pumping organ.
Answer: What is the heart?
This system transports oxygen, nutrients, and wastes throughout the body.
Answer: What is the circulatory system?
Your breathing rate increases when your body needs to remove more of this gas.
Answer: What is carbon dioxide?
These two branches carry air from the trachea into each lung.
Answer: What are the bronchi?
This chamber of the heart pumps oxygenated blood to the entire body.
Answer: What is the left ventricle?
This organ helps white blood cells mature and becomes smaller after childhood.
Answer: What is the thymus?
These cells help fight infections in the body.
Answer: What are white blood cells?
Veins contain these structures to prevent blood from flowing backward.
Answer: What are valves?
This structure contains the vocal cords and sits above the trachea.
Answer: What is the larynx?
Most blood cells are produced in this tissue found inside bones.
Answer: What is bone marrow?
Lymph vessels rely on this nearby body system to move fluid through them.
Answer: What are muscles (the muscular system)?
The skeletal and circulatory systems work together to produce these cells inside bone marrow.
Answer: What are red and white blood cells?
Christians are permitted to donate this to help others medically.
Answer: What are blood or organs?