An organ is a group of tissues in a living organism that have been adapted to perform a specific function. An organ system is a group of organs that work together as a biological system to perform one or more functions.
Our bodies made up of 11 basic organ systems. They manage all the essential body functions. These systems can become out of tune while interdependent. Once one isn’t functioning properly, the others can conceive to correct the problem. All the systems can work along to try to create what is known as homeostasis or a state of balance within the body.
The human body consists of eleven organ systems, each of which contains several specific organs. The eleven organ systems are the nervous system, cardiovascular or circulatory system, respiratory system, integumentary system, muscular system, skeletal system, lymphatic system, excretory or urinary system, digestive system, endocrine system, and reproductive system.
Now we will learn about some of the major functions of our major organ systems
System
Organs in the System
Some Major Functions of the System
Nervous System
Brain
Spinal cord
Nerves (both those that carry impulses to the brain and those that carry impulses from the brain to muscles and organs)
Coordinates activities of other organ systems
Responds to sensations
Cardiovascular System
Or
Circulatory System
Heart
Blood
Blood vessels (arteries, capillaries, veins)
Transports oxygen from the lungs and nutrients from the digestive system to the cells throughout the body. (Transports oxygen and nutrients to the cells)
Equalizes body temperature and transports endocrine hormones to cells in the body
Removes waste products
Respiratory
Lungs
Trachea
Larynx
Nasal cavities
Pharynx
Oxygen and carbon dioxide exchange
IntegumentarySystem
Skin
Hair
Subcutaneous tissue
Provides the barrier protection between the inside of the body and external environment.
Helps to regulate the body temperature and eliminate wastes in sweat
Muscular System
Muscles
Tendons
Locomotion
Heat production
Skeletal System
Bones
Cartilage
Ligaments
Bone marrow
Supports and moves the body
Protects internal organs
Mineral storage
Blood formation
Lymphatic System
Spleen
Lymph nodes
Thymus
Lymphatic vessels
Returns tissue fluid to blood
Defends against foreign organisms
Urinary System
Or
Excretory System
Kidneys
Ureters
Bladder
Urethra
Elimination of wastes
Regulates pH and volume of blood
Digestive System
Mouth
Esophagus
Stomach
Small intestine
Large intestine
Rectum
Anus
Liver
Gallbladder
Pancreas (the part that produces enzymes)
Appendix
Extracts nutrients from foods.
Excretes waste products from the body
Reproductive System
Ovaries
Uterus
Mammary glands
Testes
Prostate gland
External genitalia
Produces germ cells (eggs and sperm)
Environment for growth of fetus (female)
Endocrine System
Thyroid gland
Parathyroid gland
Adrenal glands
Pituitary gland
Pancreas (the part that produces insulin and other hormones)
Stomach (the cells that produce gastrin)
Pineal gland
Ovaries
Testes
Produces chemical messengers carried in the blood, which direct the activities of different organ systems.
In short, Regulates body functions by the chemicals (hormones).
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