They sympathetic and para sympathetic nervous system.
Respiratory system
The nervous system carries messages around the body through electrical and chemical signals. The brain, spinal cord, and peripheral nerves work together to transmit information and coordinate responses to various stimuli.
Motor neurons are able to create a response in effector organs, muscles and glands by sending signals to them.
A system carries out more activities than an organ. An organ is a part of a system and it performs specific functions, while a system is made up of multiple organs working together to perform complex, coordinated functions necessary for the survival of an organism.
nerve
it's a single organ from the nervous system
The artery is actually made of three tissues.
chicken
sensory neuron..
there is no organ,it is the nerve cell that tells us what is hot and cold.it sends signals to your brain.
the (circulatory) respiratory system (blood flow carries oxygen)
The respiratory system obtains the oxygen, the cirrculatory system carries it to different parts in the body.