1. Body systems

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

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

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

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

10. 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

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