The endocrine system affects cells with certain receptors .
The nervous system can affect only nearby cells
It sends messages that control all the systems in the body.
The nervous system controls almost every action in the human body. It controls the heart beat, your adrenaline levels, and many other things which can effect an organism.
viruses are not alive. APEX
Mutations in sex cells can be passed on to children.
Mutations in sex cells only affect offspring.
Mutations in sex cells do not affect the organism.
The endocrine system sends messages using hormones. It delivers messages from the nervous system to the excretory system. It tells the excretory system when the blood is out of balance.
A sperm or egg