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The Integumentary System

The Integumentary System. Structure of the Integumentary System. Hair Skin Nails Sweat glands and oil glands. Functions of the Integumentary System. Barrier against infection, injury, UV radiation Maintain constant body temperature

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The Integumentary System

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  1. The Integumentary System

  2. Structure of the Integumentary System • Hair • Skin • Nails • Sweat glands and oil glands

  3. Functions of the Integumentary System • Barrier against infection, injury, UV radiation • Maintain constant body temperature • When hot, sweat and more blood goes to skin to allow heat to escape • When cold, pores close and less blood goes to skin to keep heat in.

  4. Super Interesting Integumentary Facts • The skin of a 150 pound male would cover about 2 square yards and would weigh about 9 pounds. • Hair grows faster in the summer than winter and more slowly at night than during the day. • The entire epidermis (top layer of the skin) is replaced every 28 days. • One square inch of skin has (on average): • 650 sweat glands • 19 yards of capillaries • 78 yards of nerves

  5. Skeletal System

  6. Structure of the Skeletal System • Includes • Bones • Cartilage • Ligaments • Tendons

  7. Functions of Skeletal System • Movement • Supports and protects vital organs • Blood Cell Production • Stores Minerals

  8. Muscular System

  9. Structures of the Muscular System • Cardiac • Skeletal • Smooth

  10. Functions of Muscle • Movement - circulate blood, move food through digestive system • Produce body heat • Maintain posture • Stabilize joints

  11. Super Interesting Muscle Facts • You have more than 600 skeletal muscles. • 40 muscles are used to frown, 20 to smile. • The gluteus maximus is the largest muscle.

  12. Nervous System

  13. Functions • Gather and respond to information about the internal and external environment.

  14. Structures of the Nervous System • Brain • Spinal cord • Peripheral nerves (come off brain and spinal cord)

  15. Endocrine System

  16. Structures of the Endocrine System • Composed of glands that secrete hormones. • Hypothalamus • Pituitary gland • Thyroid • Parathyroid • Adrenal glands • Pancreas • Ovaries, testes

  17. Functioms • Influences growth, development, metabolism. • Helps maintain homeostasis.

  18. Circulatory System

  19. Structure and Function • Structures: heart, blood vessels, blood, lymph nodes, lymph • Function: • transport oxygen, nutrients, and waste. • Helps regulate body temperature • Collects fluid lost form blood vessels, returns it to blood.

  20. Did you know… • There are about 62,000 miles of blood vessels in the body – that would wrap around the earth 2 ½ times! • The human heart creates enough pressure to squirt blood 30 feet! • Licorice can raise your blood pressure (blood pressure refers to the pressure in the arteries)

  21. Respiratory System

  22. Functions of the Respiratory System • Obtain oxygen (needed for cell respiration) • Remove carbon dioxide • Produce vocal sounds

  23. Structures of the Respiratory System • Nose, sinuses, larynx, pharynx, trachea, and lungs.

  24. Cool Respiratory System Facts • An average adult has about 300 million alveoli! • If all the capillaries on the alveoli were laid end to end they would be 620 miles long!

  25. Digestive System

  26. Mouth Pharynx Esophagus Stomach Liver & Gallbladder Pancreas Small and large intestine Parts of the Digestive System

  27. Functions of the Digestive System • Breaks down and absorbs nutrients, salts, and water. • Eliminates solid waste (feces)

  28. Cool Digestive System Facts • The average liver weighs about 3 pounds. • The large intestine is home to about 100 trillion bacteria. • The iron in a human could make a small nail. • There is enough phosphorus in the human body to make 2,000 match tips.

  29. Excretory System • Structures: Skin, lungs, kidneys, bladder • Function: eliminates non-solid waste, helps maintain homeostasis.

  30. Immune System • Structures: white blood cells, thymus, spleen • Function: Protect against disease.

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