Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Didn't know it?
click below
Knew it?
click below
Don't know
Remaining cards (0)
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

BJU Life Science 20

Bob Jones Life Science - Chapter 20

homeostasis The internal balance or "steady state" that an organism must maintain.
erythrocyte A red blood cell that functions primarily to transport oxygen
hemoglobin The red pigment found in red blood cells that transports oxygen and some carbon dioxide
leukocyte A white blood cell that functions primarily in the body's immune system
antibody A protein the body produces to eliminate invading antigens, such as bacteria and viruses
platelet A cell fragment found in the blood that is involved in the formation of blood clots
blood plasma The fluid portion of the blood
artery A vessel that carries blood away from the heart
capillary One of many tiny blood vessels where diffusion of nutrients and exchange of gases between the blood and other body tissues take place
vein In plants, a structure containing vascular tissues in leaf blades; in animals and humans, a vessel that carries blood toward the heart
heart A muscular organ that pumps blood
atrium An upper heart chamber that receives blood from the lungs or the body
ventricle A lower heart chamber that pumps blood into the arteries
atrioventricular valve (AV valve) A one-way valve that separates an atrium from a ventricle in the heart and prevents the back flow of blood into the atrium
semilunar valve A structure in the heart that allows the blood to leave a ventricle but prevents it from returning
aorta The largest artery in the body carries blood from the left ventricle of the heart to smaller arteries in the body
pulse The rhythmic expansion of the arteries caused by the pumping of the heart
blood pressure The pressure of the blood against the walls of the arteries
inflammation The reaction of tissues to injury or infection that is characterized by swelling, redness, and increased temperature
anitgen A molecule that a macrophage recognizes as not belonging in the body, triggering an immune system reaction
immune system The body system that produces special chemicals and blood cells to fight specific pathogens
allergy The overreaction of the immune system to a foreign substance that is normally not a pathogen
kidney An organ found in most vertebrates that filters wastes from the blood
ureter A tube that carries urine from a kidney to the urinary bladder
urinary bladder An organ that temporarily stores the fluid wastes (urine) from a kidney
urethra The tube that carries urine from the urinary bladder to the outside of the body
nephron A microscopic unit that filters blood in a kidney
urine A fluid that contains wastes from the blood and is passed out of the body
Created by: heidio



Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards