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THE HUMAN BODY

LESSON 3. THE HUMAN BODY. 3- 1. The Human Body. Composed of many different organs and tissues All parts work together To sustain life Allow activity Injury or illness impairs functions. Primary Areas of the Body. Cardiovascular System: Primary Organs. Heart Blood Blood vessels.

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THE HUMAN BODY

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  1. LESSON 3 THE HUMAN BODY 3-1

  2. The Human Body • Composed of many different organs and tissues • All parts work together • To sustain life • Allow activity • Injury or illness impairs functions

  3. Primary Areas of the Body

  4. Cardiovascular System: Primary Organs • Heart • Blood • Blood vessels

  5. Cardiovascular System: Primary Functions • Transports blood to lungs • Delivers carbon dioxide and picks up oxygen • Transports oxygen and nutrients to all parts of body • Helps regulate body temperature • Helps maintain body’s fluid balance

  6. Cardiovascular System: Emergencies • Any condition that affects respiration • Reduces ability to deliver oxygen • Severe bleeding • Shock • Stroke • Reduces blood flow to part of the brain • Heart conditions • Reduce tissue oxygenation • Heart attack • Can lead to cardiac arrest • Ventricular fibrillation • Heart muscle flutters rather than pumping blood

  7. Nervous System: Primary Organs • Brain • Spinal cord • Sensory receptors • Nerves

  8. Nervous System: Primary Functions • Sensory receptors gather information about environment and send to brain • Brain integrates and analyzes information • Nerve signals from brain lead to actions throughout body to accomplish tasks or maintain homeostasis

  9. Nervous System: Emergencies • Head and spinal injuries • Can have serious/life-threatening effects • Injury to part of brain or stroke • May destroy or impair one or more functions • Damage to spinal cord • May cause complete loss of function to body area or paralysis • Altered mental status from: • Head injuries • Any injury causing decreased oxygenation • Sudden illness (e.g., stroke, seizure, diabetes) • Severe infection or fever • Poisoning or drug overdose

  10. Musculoskeletal System: Primary Organs • Bones • Muscles • Ligaments • Tendons

  11. Bones: Primary Functions • Provide body shape and support • Protect vital organs • Produce blood cells • Act as levers to allow joint movement

  12. Muscles: Primary Functions • Skeletal muscles attach to bones and allow movement • Produce body heat • Perform pumping action of heart and work of breathing

  13. Musculoskeletal System: Emergencies • Fractures • Dislocations • Sprains • Strains

  14. Integumentary System • Skin • Nails • Hair • Accessory structures • Sweat glands • Oil glands

  15. Integumentary System: Primary Functions • Protects body • Helps regulate body temperature • Helps prevent water loss • Removes some body wastes • Produces Vitamin D • Sensation (e.g., touch, pressure, pain, temperature)

  16. Integumentary System: Emergencies • Cuts and scrapes • Common causes ofbleeding • Openings in skin • Allow pathogens into body • Heat and chemical burns • Loss of body heat • Loss of body fluid

  17. Helps defend against disease Part of immune system Problems seldom cause emergencies Always take precautions against infection Tetanus vaccine provides protection Lymphaticand ImmuneSystem

  18. Glands that produce hormones Most problems develop slowly and are rarely emergencies Imbalances may cause diabetic emergencies Endocrine System

  19. Urinary System • Blood transports wastes to kidneys • Kidneys filter wastes and produce urine

  20. Traumatic injury may damage organs Look for blood in urine Health problems May cause change in urination Dehydration Lack of urination Urinary System continued

  21. Female Produces eggs Supports and nurtures fetus in uterus Childbirth Lactation Male Produces and transports sperm Reproductive System

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