When categorised there are eleven organ systems in the human body. Now these eleven are not independent and depend on each other heavily for their functioning and overall working of all the organs. But first what is an organ? An organ is a group of tissues that serve the same purpose. Now when a group of these organs that compliment each other’s functioning, they form an organ system. Now there are major organs in our body that are key and hence the center of the organ systems :

• The Heart

• The brain

• The Lungs

• The liver

• The kidney 

I will get straight to the systems as there is a lot of ground to cover. I will be discussing the system, its components and its function in ensuring the routine and proper functioning of the anatomy of the human body.

 INTEGUMENTARY SYSTEM

This system is one that consists of the skin, the largest organ of our body, hair and nails. Since skin is the largest organ of the body and the first defense against foreign objects it does play a significant role.

• It prevents external harm to the body.

• Regulates the body temperature via sweat also called thermoregulation

• The skin also acts as an excretory organ that balances the water and salt amount in the body

• Plays a vital role in sensory receptors in the body

 SKELETAL SYSTEM

As the name suggests it contains the skeleton, which is bones, teeth and joints. Every bone is connected by a tendon, ligament or a cartilage. The joints are the reason for the proper movement of many parts of the body. Some other key functions include:

• Holding key organs in place

• Locomotion of the body is facilitated by the skeletal framework

• Provides posture to the body

• Ensures the body can withstand external physical strain 

MUSCULAR SYSTEM

The muscular system consisting of muscles has three key types, including skeletal muscles, which stay attached to the bones by tendons and permit for desired voluntary movements.

• Smooth muscles control involuntary movements (reflexes) of the internal organs, like digestion which allows food to move within the system.

•  Smooth muscles are also present in blood vessels and allow vasoconstriction and vasodilation of the vessels and help fluctuate the body temperature.

•  Cardiac muscle tissues are responsible for controlling the involuntary beating of the heart, allowing it to pump blood through the blood vessels of the cardiovascular system.

•   Help in lifting weights and other physical tasks 

THE NERVOUS SYSTEM

The nervous system constitutes the brain, the spinal cord and all the nerves in the body. It constitutes the central nervous system and the latter make up the Peripheral nervous system of the body.

• Responsible for stimuli responses.

• Carrying messages from spinal cord and brain to the rest of the body and vice versa.

ENDOCRINE SYSTEM

 This consists of organs that secrete hormones into the blood. These organs include the liver, the pancreas, the pituitary gland, thyroid gland adrenal glands. These hormones are responsible for key functions like

• Regulation of metabolism, growth, blood component control

• Sexual maturity

• Act as chemical messengers

CARDIOVASCULAR SYSTEM

The circulatory system, also known as the cardiovascular system contains the heart, blood and blood vessels. There are three types of blood vessels, arteries, veins and capillaries.

Functions are

• The heart pumps blood to different parts of the body

• The arteries carry blood from the heart to other parts of the body, the veins do the vice versa.

• It helps in purifying blood as it pumps it to the lungs

• Transports secreted hormones in the blood to their designated places

URINARY SYSTEM

It comprises mainly a pair of kidneys, a urinary bladder and ureters.

• It is responsible for balancing the amount of water, salt in the boy

• Excretes toxic waste in the body via urine.

• Produce enzymes and other secretions that help in regulating blood pressure.

 RESPIRATORY SYSTEM

 The main components of this are the Lungs, trachea, alveoli and the nose. The key functions are

• To purify the air one breathes and remove all carbon dioxide

• To absorb the oxygen and supply it to the blood

LYMPHATIC SYSTEM

Often considered as a part of the immune system, this consists of the spleen, tissues, lymph nodes and vessels that form a network.

• These collect bodily fluids from lymph

• Produce Lymphocytes that are a type of white blood cell

DIGESTIVE SYSTEM

As the name suggests, is the system that deals with the digestion of food. It consists of the esophagus, the large and small intestines, and the stomach.

• Absorbs nutrients from the food

• Breaks down the food into smaller parts.

• Removes the unwanted parts of the food

MALE AND FEMALE REPRODUCTIVE SYSTEM

The male reproduction consists of a penis and the testis. The female system consists of the Ovaries and the uterus. It is the only system that is different between men and women

• Testicles make the sperm

• The Penis helps in ejaculation

• The ovaries are where the eggs are

• Uterus holds the fetus for 9 months

• This system is vital for the survival of the human race and continuing for the species.

 CONCLUSION

There are a number of different working systems that work simultaneously for the well functioning of the human body. Each system is important and plays a vital role. No one system can be isolated and expected to function normally. All systems in some way or the other are interdependent. No system is more important than the other, all have roles that are a must for the regular functioning of the body.