The diagram below shows a model of the circulatory system. Red represents blood that has high oxygen content and blue represents blood that has low oxygen content.
When one part of the heart contracts, blood moves from the heart to the lungs. Which statement best explains this motion of the blood?
A. The heart only contracts when it contains blood with high oxygen content.
B. The lungs cause the heart to contract when they need more blood.
C. The lungs move to inhale and exhale gases when the heart contracts.
D. The heart supplies the force that moves blood through the body.
Answers: 2
Biology, 21.06.2019 15:10
Secondary succession would most likely be taking place in a(n)
Answers: 1
Biology, 21.06.2019 20:00
The shift of a vehicle's weight around its center of gravity is known as
Answers: 2
Biology, 21.06.2019 22:50
Parasitism could be considered a form of which of these types of relationships? -mutualism -commensalism -predator-prey -mimicry
Answers: 1
Biology, 22.06.2019 01:30
Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.
Answers: 1
The diagram below shows a model of the circulatory system. Red represents blood that has high oxygen...
English, 19.11.2020 05:40
Biology, 19.11.2020 05:40
Mathematics, 19.11.2020 05:40
Computers and Technology, 19.11.2020 05:40
History, 19.11.2020 05:40
History, 19.11.2020 05:40
Mathematics, 19.11.2020 05:40
Mathematics, 19.11.2020 05:40
Spanish, 19.11.2020 05:40