The systemic circulation is as follows:
The blood flows from the left atrium to the left ventricle. From there, it goes into the aorta where it gets distributed to the rest of the body. The blood would then go into the vena cavae and then to the right atrium, then to the right ventricle. It would go to the pulmunary arteries then get distributed to the lungs. Then the pulmonary veins would carry the oxygenized blood back to the left atrium and the cycle continues.
When the concentrations of estrogen and progesterone are low
I HOPE that 1, 2, or 3 helps you!! :)
Answer:
1. The cycle of energy is based on the flow of energy through different trophic levels in an ecosystem. ... If large predators are present, they represent still higher trophic level and they feed on carnivores to get energy. Thus, the different plants and animal species are linked to one another through food chains.
Explanation:
2. When organisms use organic matter for cellular respiration, ALL the matter goes back into carbon dioxide, water, and minerals, while ALL the energy leaves the ecosystem as heat (which is ultimately radiated out into space). So matter cycles, energy flows through ecosystems.
3. The amount of energy at each trophic level decreases as it moves through an ecosystem. As little as 10 percent of the energy at any trophic level is transferred to the next level; the rest is lost largely through metabolic processes as heat.
Relative dating is used to determine a fossils approximate age by comparing it to similar rocks and fossils of known ages. Absolute dating is used to determine a precise age of a fossil by using radiometric dating to measure the decay of isotopes, either within the fossil or more often the rocks associated with it.
That's how you know the age of fossils hope this helps diamonds in the name
