The nervous system
The nervous system . They transmit messages in the form of electrical impulses through neurons and convey to our sense organs. The nervous system enables humans to react to their surroundings and to coordinate their behaviour. Hormonal and nervous control of heart rate A2 Science YouTube from www.youtube.com In the hierarchy of life, an organ lies between tissue and an organ system.tissues are formed from same type cells to act together in a function. The only difference is that our courses are designed to be studied from home at your own pace, and you will receive full tutor support via. The sympathetic nervous system consists of nerves arising from the spinal cord between the neck and waist region.