Skeletal System
Main Organs/Structures: Bones, cartilage, ligaments, joints
Functions: Support, protection, movement, mineral storage, blood cell production
Key Concepts: Axial vs Appendicular skeleton, bone remodeling
Muscular System
Main Organs/Structures: Skeletal, smooth, and cardiac muscles
Functions: Movement, posture, heat production
Key Concepts: Muscle contraction, voluntary vs involuntary muscles
Nervous System
Main Organs/Structures: Brain, spinal cord, nerves, sense organs
Functions: Control and coordination, response to stimuli
Key Concepts: Neurons, CNS vs PNS, reflex arc
Cardiovascular System
Main Organs/Structures: Heart, blood vessels, blood
Functions: Transport of substances, maintain circulation and pressure
Key Concepts: Systemic and pulmonary circulation, blood components
Respiratory System
Main Organs/Structures: Nose, pharynx, larynx, trachea, bronchi, lungs
Functions: Gas exchange, pH balance
Key Concepts: Breathing mechanics, alveolar exchange
Digestive System
Main Organs/Structures: Mouth, esophagus, stomach, intestines, liver, pancreas
Functions: Breakdown and absorption of nutrients, waste elimination
Key Concepts: Peristalsis, enzyme action, nutrient absorption
Urinary System
Main Organs/Structures: Kidneys, ureters, bladder, urethra
Functions: Waste removal, fluid and electrolyte balance
Key Concepts: Nephron structure, filtration and reabsorption
Endocrine System
Main Organs/Structures: Glands (pituitary, thyroid, pancreas, adrenal, etc.)
Functions: Hormone regulation of body processes
Key Concepts: Feedback loops, hormone functions