During respiration, we breathe in _______ and breathe out _______.
oxygen, carbon dioxide
_______ is a tube that connects our mouth to our bronchi.
Trachea
Air enters the body through the _______ and _______.
mouth, nose
What is the large dome-shaped muscle under the lungs called?
diaphragm
True or False: Our bodies need oxygen in order for our muscles to function.
true
True or False: The heart has five chambers
False (four chambers)
The three types of blood vessels are _______, _______, and _______.
arteries, veins, capillaries
Which organ pumps blood throughout the body?
heart
_______ is a type of cell that fights germs and infections in our body.
white blood cells
_______ is a type of cell that absorbs oxygen in the lungs and transports it to organs and muscles.
red blood cells
The _______ is made up of organs that remove waste substances from the body.
excretory system
_______ is a liquid stored in the bladder and expelled through the urethra.
urine
True or False: Sweat and Carbon Dioxide are waste substances.
True
_______ is an organ that filters blood as our bodies eliminate liquid waste.
Kidneys
In which organ are nutrients absorbed and passed into the blood?
Small Intestine
______ is a liquid produced in the liver that helps digest food.
Bile
