To: Human Body

1
Welcome

• To Human Body
• BIOL 1104

2
Anatomy and Physiology

• You are about to begin an exciting journey
  through the human body. Hang on - the travel
  speed is fast, but if you come prepared this will
  be one of the most beneficial and exciting
  journeys of your life!

3
Did you know...

• that your cartilage is 80 water?

4
Did you know...

• that your skin contains
• 70 cm of blood vessels, 55 cm of nerves, 100
  sweat glands, 150 oil glands, 230 sensory
  receptors, and 1/2 million cells?

5
Did you know...

• That the outer layers of your skin are replaced
  every 40 days, and the cells lining your
  intestine are replaced every 36 hours?

6
Did you know...

• Red blood cells are produced at a rate of 2
  million per second?

7
Did you know...

• In 1 cell layer, in 1 square inch of skin there
  are 1 million cells?

8
Did you know...

• In the adult human body there are approximately
  10 million new cells produced per second?

9
Did you know...

• You clear from your respiratory system, and
  swallow greater than 2 million macrophages per
  hour?

10
??? Did ya know ???

• Mark McGwire used andro (androstenedione) to
  increase strength and speed of recovery from game
  to game.

11
??? Did ya know ???

• Andro is a hormone precursor. The body
  converts andro into testosterone, which boosts
  strength and RBC count, AND ESTROGEN - WHICH
  SHRINKS TESTICLES AND INCREASES BREAST SIZE.
• Testosterone levels can rise as much as 6x within
  1 hr. of taking andro.
• andro has all the potential dangers of excess
  testosterone - acne, increased facial hair,
  prostate hypertrophy, rage, liver problems,
  kidney problems, heart disease, increased cancer
  risks.

12
Homeostasis feedback loop
13
Positive feedback loop
variable value keeps increasing with each
feedback loop