The main function of the respiratory system is to take in oxygen and expel carbon dioxide.
The circulatory system transports nutrients and hormones.
The digestive system breaks down food into nutrients.
The endocrine system regulates metabolism.
The circulatory system is responsible for transporting blood throughout the body.
The respiratory system exchanges gases.
The nervous system transmits signals.
The skeletal system supports body structure.
Liver
Lungs
The heart is responsible for pumping blood.
Kidneys
The skeletal system provides support and protection for the body's organs.
The muscular system produces movement.
The circulatory system circulates blood.
The digestive system processes food.
It supports body tissues.
It filters blood.
It transmits nerve signals.
The digestive system breaks down food into nutrients the body can use.
Nervous system
The endocrine system controls body activities with hormones.
Respiratory system
Digestive system
The excretory system is responsible for removing waste from the body.
Skeletal system
Endocrine system
Immune system
The nervous system controls and coordinates body activities by transmitting signals between different parts of the body.
It digests food.
It stores minerals.
It excretes waste.
The skin is the largest organ in the human body.
Heart
Liver
Brain
The immune system defends against pathogens and fights infections.
It circulates blood.
It supports muscles.
It filters air.
The circulatory system
The endocrine system
The respiratory system
The urinary system includes the kidneys and bladder.
The muscular system is responsible for producing movement in the body.
The skeletal system
The nervous system
The cardiovascular system
The cerebellum controls balance and coordination.
The cerebrum
The brainstem
The hippocampus
They control body movements.
They aid in digestion.
Red blood cells transport oxygen from the lungs to the rest of the body and bring carbon dioxide back to the lungs for expulsion.
They produce hormones.
The esophagus is the tube that connects the mouth to the stomach.
Trachea
Intestine
Bronchus