Digestive System
Circulatory System
Respiratory System
Excretory System
Systems
100
Where does the energy your body needs come from?
Food
100

ed blood cells differ from white blood cells in that they

A. live longer than white blood cells

B. are larger than white blood cells

C. are made mostly of hemoglobin

D. have more than one nucleus

C. are mostly made of hemoglobin
100
What substances are produced during respiration?
carbon dioxide and water
100
What is the main function of the excretory system?
to collect and remove wastes from the body
100
What is the diaphragm's function?
Large, dome-shaped muscle that works with the rib muscles causing air to move into and out of the lungs.
200
What organ produces hydrochloric acid in the digestive system?
stomach
200

Why does heart beat faster during exercise?

to provide muscles with more oxygen

200
Which parts of the respiratory system divide into smaller and smaller tubes in a pattern resembling branches?
bronchi
200
Which organ of the excretory system stores urine until the body is ready to eliminate it?
urinary bladder
200
What is the kidneys function?
filters and removes urea and other wastes 
300
What factors determine how many calories you need during the day?
person's size, age, and level of activity
300
What is blood lacking if it will not clot?
platelets
300
What is the movement of air into and out of the lungs?
breathing
300
Which excretory organ produces urea?
liver
300
What is the function of the urinary bladder?
muscular sac that stores urine
400
Are there more red or white blood cells in a given volume of blood?
red
400
What leads from the pharynx toward the lungs and is called the windpipe?
trachea
400
What is the watery fluid that urea, excess water, and other waste materials are eliminated in?
urine
400
Compare and contrast a ureter and urethra.
Both carry urine. Ureter carries urine from the kidneys to the bladder.  Urine is eliminated from the body through the urethra.
500
About 45 percent of the volume of blood is cells. What is the rest?
plasma
500
How are the bronchus and trachea related?
it is one of the branches of the trachea
500
What does the amount of water in the kidneys depend on?
conditions inside and outside of the body
500

What small structures make up the lungs? What happens there?

Alveoli; gas moves between air and blood (gas exchange)
M
e
n
u