Blood always flows through the system in the same pattern: coming from the body, passing through the right side of heart, then out to the lungs to receive oxygen, then passing back through the left side of the heart and then traveling out to the body. Heart valves help to keep the blood flowing properly to each important destination of the circulation journey.
the simplest answer would be it makes a ecosystem more stable. you also have more variety witch helps incase a promblem occurs
Explanation:
It depends upon some factors like
Major factor
- Your age
- Your lifestyle
- Your size
Other factors
- Some hormones
- Some medicine
- Being unwell
Answer:
Functions of epithelial cells include secretion, selective absorption, protection, transcellular transport, and sensing. Epithelial layers contain no blood vessels, so they must receive nourishment via diffusion of substances from the underlying connective tissue, through the basement membrane