Circulatory System
The upper chambers of the heart are called this.
What are atriums
Food enters the digestive system through this opening.
What is the mouth?
This structure is also known as the voice box.
What is the larynx?
This tube carries urine from the kidneys to the bladder.
What is the ureter?
This is the largest organ in the human body.
What is skin
This protein in red blood cells binds oxygen.
What is hemoglobin?
Food is churned and mixed with acid in this organ.
What is the stomach?
The use of oxygen by cells to produce energy is called this.
What is cellular respiration
Urine is mostly composed of this substance.
What is water
The most common unnecessary organ in the body
What is the appendix?
The heart has this many chambers.
What is four?
The movement of nutrients into the bloodstream is called this.
What is absorption?
The left lung has fewer lobes because of this organ.
What is the heart
This muscular structure controls urine release from the bladder
What is the uritheral sphincter?
What the liver produces
What are enzymes
This valve prevents backflow from the right ventricle to the right atrium.
What is the tricuspid valve?
This flap prevents food from entering the windpipe.
What is the epiglottis
Air first enters the respiratory system through this structure.
What is the nose?
These are the functional units of the kidney.
What are nephrons
How many chambers does your heart have
What is four?
These are the smallest blood vessels in the body.
What are capillaries?
The stomach uses this acid to help digest food.
What is hydrochloric acid
The trachea divides into two of these airways.
What are bronchi
This part of the kidney collects newly formed urine
What is the renal pelvis
This is the longest nerve in the body.
What is the sciatic nerve