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ICSE Class 8 Answered

differentitate 1)cranial nerves  and spinal nerves 2) enzyme and hormone
Asked by nathsantanukumar | 03 May, 2018, 09:22: AM
answered-by-expert Expert Answer
1. Cranial Nerves originate from the different parts of the brain and mainly related to the head and neck position of the person whereas spinal nerves are the nerves which originate from the spinal cors of the human being.
2. There are 12 pairs of Cranial Nerves in the human body whereas there are 31 pairs of Spinal Nerves in the human body.
 
Hormones
(i)Hormones are chemical substances produced by specific organs of the body like adrenal glands, pituitary glands, pancreas, etc.
(ii) These are released directly into the blood stream.
Enzymes
(i)Enzymes are large biological molecules that are responsible for the thousands of chemical reactions happening simultaneously in a body.
(ii)These are not released into the blood stream directly.

Answered by Sivanand Patnaik | 05 May, 2018, 01:37: PM
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