Answer:
When the heart contracts, it pushes the blood out of the heart and into the large blood vessels of the circulatory system. From here, the blood goes to all of the organs and tissues of the body. During systole, a person's blood pressure increases.
Explanation:
When the hearts contracts
it pushes blood out of the heart
and it goes to a blood vessel of the
circulatory system.
Its C
Answer:Role of Keystone Species in an Ecosystem. Earth Science, Ecology, Biology. A keystone species helps define an entire ecosystem.
Pollution :) Since Abiotic means non living.
Bacteria: Living
Food (worms or smaller fish): Living
Predators: Living
Pollution (dirt, trash, or other stuff): Non Living