Resting Heart Rate: 1) Measure your resting heart rate. Using...

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Nervous System

• Organs: Brain, spinal cord, nerves
• Functions:
  • Controls and coordinates all body activities
  • Processes sensory information
  • Enables thought, memory, and emotion

Endocrine System

• Organs: Pituitary gland, thyroid gland, adrenal glands, pancreas, ovaries (in females), testes (in males)
• Functions:
  • Produces and secretes hormones
  • Regulates body processes such as growth, metabolism, and reproduction

Cardiovascular System

• Organs: Heart, blood vessels (arteries, veins, capillaries), blood
• Functions:
  • Transports oxygen, nutrients, hormones, and waste products throughout the body
  • Helps regulate body temperature

Lymphatic/Immune System

• Organs: Lymph nodes, lymphatic vessels, spleen, thymus, tonsils, bone marrow
• Functions:
  • Defends the body against pathogens and disease
  • Returns excess interstitial fluid to the blood
  • Absorbs fats from the digestive system