The heart begins its work approximately 21 days after conception. As a single cell pump, it will soon develop into four distinct chambers. It becomes the muscle; all other muscles depend to do their work. Beating on an average day 115,000 times, about 200 gallons of blood is pumped into arteries and veins traveling an unprecedented 12,000 miles a day while overcoming gravity to provide nutrients to every organ, muscle, nerve, and tissue.
It is the force of the hearts contraction that maintains our blood pressure; allowing us to breathe and exchange gases at all levels of respiration, ensuring oxygen is provided to all cells of the body, and waste products are eliminated.
Answer:
what do you mean by domain kingdomx 3?
Answer:
False
Explanation:
The muscles of the anterior compartment of the forearm perform flexion at the fingers and wrist, while muscles in the posterior compartment of the forearm perform extension at the fingers and wrist
<span>Which of these activities are ways people degrade commons? Select the two correct responses.
</span>
<span>A. Farmers allow livestock to overgraze federal pastureland.
AND
</span>
<span>D. Hunters hunt a valued species to extinction. </span>
Answer:
A
Explanation:
They are the foundation of the aquatic food web, they get eaten by zooplankton and then they get eaten by fish and whales.
