Body systems

Digestive System Structures: Mouth Esophagus Stomach Small intestine Liver Pancreas Large intestine Rectum Function: Breaks down food; absorbs nutrients; removes food wastes

Respiratory System Nose Pharynx Larynx Trachea Lungs Bronchi Alveoli Brings in oxygen needed by cells; Removes carbon dioxide from body

Circulatory System Structures: Heart Arteries Veins Capillaries Function: Transports oxygen, nutrients, and wastes; Fights infection; Helps regulate body temperature

Excretory System Skin Lungs Liver Kidneys Urinary bladder Urethra Function: Removes waste products from the body

Musculoskeletal System Structures: Skeletal Muscle Smooth Muscle Cardiac Muscle Bones Cartilage Ligaments Tendons Function: Supports body Protects internal organs Allows movement Stores minerals Produces blood cells Produces movement Helps circulate blood Moves food through the digestive system

Nervous System Structures: Brain Spinal Cord Nerves Function: Controls the body’s responses to changes in external and internal environments