Human Body Organ Systems
The Human body has 11 organ systems – cardiovascular (circulatory), digestive, endocrine, excretory (urinary), immune(lymphatic), integumentary, muscular, nervous, reproductive, respiratory, and skeletal. Let’s review what we know about them!
Cardiovascular (Circulatory) System Function Carries oxygen and food to cells Carries carbon dioxide away from cells Transports nutrients, chemical messengers, gases, and wastes in the blood Organs/Structure Heart Blood Blood vessels
Respiratory System Function Organs/Structures Mouth Nose Trachea Adds oxygen to the blood Removes Carbon Dioxide from the blood Organs/Structures Mouth Nose Trachea Bronchi lungs
Digestive System Function Organs/Structures Breaks down food into units that can be absorbed by the body Used by the body’s cells for energy Organs/Structures Mouth Esophagus Stomach Intestines
Endocrine System Function Organs/Structures Controls cell function with hormones: Growth Development Metabolism Reproduction Organs/Structures pituitary gland Thyroid thymus
Urinary (Excretory) System Function Removes waste from the body Maintains body fluid volume, pH and electrolyte levels Organs/Structures Kidney bladder
Lymphatic (immune) System Function Protects the body from disease Organs/Structures White blood cells Spleen Lymph nodes
Integumentary System Function Organs/Structures Provides a protective barrier for the body Contains sensory receptors for pain, touch and temperature Organs/Structures Skin Hair Nails Sweat and Oil Glands
Muscular System Function Organs/Structures Works with skeletal system to produce movement Moves bones and maintains structure Organs/Structures Skeletal muscles Smooth muscles Tendons
Skeletal System Function Organs/Structures Supports the body Works with muscular system to move the body Protects major organs Organs/Structures Bones Cartilage Ligaments
Nervous System Function Organs/Structures Controls cell function with electrical signals Organs/Structures Brain Spinal cord Nerves
Reproductive System Function Produces reproductive cells (gametes) Responsible for producing offspring Female organs provide environment for development of fetus