| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.17 |
| Score | 0% | 63% |
What prevents blood pumped out of the ventricles from flowing back into the heart?
capillaries |
|
platelets |
|
atria |
|
valves |
The heart is the organ that drives the circulatory system. In humans, it consists of four chambers with two that collect blood called atria and two that pump blood called ventricles. The heart's valves prevent blood pumped out of the ventricles from flowing back into the heart.
Water coming to a boil on a stove, ice melting, and steam from a cup of coffee are all examples of which of the following?
conduction |
|
radiation |
|
reflection |
|
convection |
Convection is the transfer of heat by the circulation or movement of the heated parts of a liquid or gas.
Blood is circulated throughout the body via:
capillaries |
|
veins |
|
aorta |
|
arterioles |
The aorta is the body's largest artery and receives blood from the pulmonary vein via the left ventricle. From there, blood is circulated through the rest of the body through smaller arteries called arterioles that branch out from the heart. Finally, blood is delivered to bodily tissues through capillaries.
Blood is delivered to bodily tissues through:
plasma |
|
veins |
|
arterioles |
|
capillaries |
The aorta is the body's largest artery and receives blood from the pulmonary vein via the left ventricle. From there, blood is circulated through the rest of the body through smaller arteries called arterioles that branch out from the heart. Finally, blood is delivered to bodily tissues through capillaries.
An endoskeleton (internal skeleton) is a charateristic of __________ animals, including humans.
arthropod |
|
vertebrate |
|
spiny |
|
sentient |
An endoskeleton (internal skeleton) is a charateristic of vertebrate animals, including humans.