We have 5 senses to detect changes in the environment around us. These changes are known as __________ and we have __________ in different organs to detect them:
We can also detect changes inside our body for example __________ (Thermoception) and __________ level.
Information from the __________ is sent to the brain via __________ neurons (nerve cells). Then commands are sent to __________ via __________ neurons. The effectors may either be __________ or __________.
__________ will contract, moving the body. __________ release chemical into the blood called __________, which affect other organs.