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Research Report
Introductions to Body Systems (Criteria A - Knowing and Understanding)
An organ system is a group of organs that work together to perform specific functions and life processes for the body’s overall health and for the survival of the being. Each organ system has a unique role, but they often interact with each other to maintain homeostasis which is a self-regulating process by which the body maintains stability while adjusting to changing external conditions.
Major body systems are the organ systems in the body which are very important to the body and they are significant. The major body systems are listed below : 
Nervous system
Glandular system
Respiratory system
Digestive system
Reproductive system
Immune system
Cardiovascular system
Skeletal system

1. Nervous system :
 #Structure of the Nervous system : 
-Central Nervous system 
-Peripheral Nervous system

#Primary functions
-Sensory Input : Receives input from sensory organs like eyes, ears, skin, nose, etc.
-Processing : This processes and interprets sensory inputs and decides what actions to take.
-Output : Sends signals to muscles and glands to respond to the input.

#Its Role in maintaining our health
-The nervous system is crucial for nearly every function in our body, even from basic thinking to survival. It regulates vital unnoticed processes such as breathing, heartbeat and it enables voluntary movements and complex tasks. The nervous system is important to mental health, cognitive functions and emotional stability. 

#Basic Overview
-The nervous system helps all the parts of the body to communicate with each other. It also reacts to changes both inside and outside the body. It consists of Brain, Spinal cord, a network of nerves, and nerve fibres. The nervous system consists of special cells called neurons, through neurotransmitters the information gets exchanged and this process is called neurotransmission.

2.Glandular system : 
#Basic Overview
-The system formed by a group of glands is the glandular system. Glands are the groups of epithelial cells which produce and discharge. There are 2 types of glands : 
i) Exocrine glands
The glands which have a duct or tube to pass their produce and discharge are exocrine glands.

ii) Endocrine glands
The glands which don’t have a duct or tube to pass their produce and discharge are endocrine glands.

 #Structure of the Glandular system include hypothalamus, pituitary, pineal, thyroid, parathyroid, adrenal, pancreas, ovaries(females), testes(males) 

#Primary Functions
-Hormone production : Glands produce and directly release hormones into the bloodstream.
-Regulation : Hormones regulate metabolism, growth and development, tissue function, sexual function, reproduction, sleep and mood.

#Role in maintaining health
The glandular system orchestrates long-term bodily processes through hormones. For instance:
- Thyroid hormones control metabolism.
- Insulin from the pancreas regulates blood sugar.
- Adrenaline affects the body’s response to stress.
- Reproductive hormones influence sexual function and reproduction.


#Interplay between Nervous and Glandular system
-The glandular system plans long-term bodily processes through hormones. For instance : 
  -Hypothalamus : This brain region serves as the main communicator between the nervous and glandular system, showing how the body responds to changes.
  -Hormones' stress hormones influence brain activity and vice versa. Which shows a deep connection between the systems.