circulatory and respiratory

Question 1

positive feedback loop

Answer 1

When a change in a system causes another change that increases the first change

Question 2

trachea

Answer 2

transports air into the lungs

Question 3

bronchi

Answer 3

branch of trachea to each lung

Question 4

bronchioles

Answer 4

Branch it bronchi into alveoli

Question 5

diaphragm

Answer 5

involuntary muscle that controls breathing

Question 6

alveoli

Answer 6

air sacs where gas exchange occurs

Question 7

vein

Answer 7

will always go near or enter the heart

Question 8

artery

Answer 8

always leaves the heart

Question 9

capillary

Answer 9

arteries that get really small, super thin gas exchange site

Question 10

blood components

Answer 10

• red blood cells (carries oxygen)
• plasma (water with nutrients and waste) more than half of the mixture
• platelets (clot blood)
• white blood cells (fighting germs and infections)