Answer:
is one in which blood flows through two capillary beds before being sent back to the heart.
Explanation:
A portal system can be defined as a system of blood vessels having a capillary network at each end, meaning that the blood vessel starts and ends in capillaries, before finding its way back to the heart. The blood draining through the capillary bed flows via the larger vessel to supply the blood to the another structure's capillary bed.
Choline is a vitamin responsible for metabolism, maintenance of the integrity of cell membranes, and most commonly, for the synthesis of the major neurotransmitter acetylcholine. In the excess choline in the body results in toxicity manifested as excess perspiration, fishy body odor, diarrhea, and low blood pressure.
Answer:
carbon dioxide, salts, urea, and uric acid
Answer:
Explanation: If there is more consumption of forests, then there's less habitats and home for animals and they will leave to find another place to live. Continuous forestation will cause more and more animals to leave until there are practically none.
Coal, as we cannot easily produce more of it.
