Human Physiology

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Human Physiology
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Tissues

• Tissues
• Group of cells with a common structure and
  function
• Types
• Epithelial- Lines body surfaces protection and
  prevents dehydration
• Nervous- nerve cells body communication
• Connective- support, connect, and insulate fat,
  bone, tendons, blood
• Muscle- enable movement skeletal (conscious
  control), smooth (involuntary), cardiac (heart)

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Organs

• Organs- 2 or more types of tissues together to
  perform a specific function.
• We will cover
• Nervous
• Circulatory
• Respiratory
• Digestive
• But theres more!!!!!!

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Nervous System

• Made of neurons
• Nerve cells that transmit info through the body
• Structure
• Dendrites
• Cell Bodies
• Axons
• Myelin Sheath

C
A
B
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How the neurons work

• Transmit an electrical impulse through neuron
• Each neuron has a resting potential
• When neuron carries a charge it reverses its
  resting potential (called Action Potential)

Nerve Cell
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How the neurons work (cont..)

• Electrical impulse goes through axon to end of
  neuron
• Where the neuron meets another cell is called a
  synapse
• There is a gap at the synapse
• To transmit the signal through the gap, the
  neuron releases neurotransmitters

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Drugs

• Many drugs prevent the reuptake of
  neurotransmitters (which means there is more
  molecules in between neurons) feeling good
• Cocaine (dopamine), Prozac (seratonin) (many
  anti-depressants)
• Some mimic neurotransmitters
• Morphine, Codeine, Heroin (many pain killers).
• Some decrease neuron activity
• Alcohol

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Nervous System Organization -Interprets and
processes info

• Central Nervous system
• Brain
• Cerebrum, Cerebellum, Brainstem
• Spinal Cord

1
2
3
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Peripheral Nervous System

• Motor nerves
• Send command from CNS to muscles, etc.
• Sensory nerves
• Send commands from skin, etc. to CNS

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How your body basically works.

• So Nerves essentially carry electricity
• What happens when you get shocked?
• What happens to your muscles when shocked?
• When you think, electricity is made. The signal
  goes to your muscle, making it contract.
• What are your muscles connected to?
• Therefore.

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Your major bones
Skull
A
Clavicle
B
Scapula
K
Sternum
L
Humerus
C
Ribs
M
Ulna
D
Radius
Pelvic Girdle N
E
Carpals
F
Femur
G
Patella O
Tibia
H
Fibual
I
Tarsals
J
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Knee Problems

• http//www.aclsolutions.com/anatomy.php
• http//health.allrefer.com/pictures-images/acl-inj
  ury.html