Answer:
it would be 6
Explanation:
6 types of joints in the human body
B, proton is positive and it does not represent the symbol
The immune system and the nervous system maintain extensive communication, including 'hardwiring' of sympathetic and parasympathetic nerves to lymphoid organs. Neurotransmitters such as acetylcholine, norepinephrine, vasoactive intestinal peptide, substance P and histamine modulate immune activity.
Hunting is regulated because plants still need to be eaten by the deer. if they arent, a plant species grows uncontrollably and kills off other plants.
