Biology by Mister Spoor
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The human eye (animation)

The Human Eye
Watch the animation above. Don't forget to click on 'discover more' (at the right) to see all animations.
  1. How can we see colours?
  2. What do you see when it's almost totally dark? Do you see colours? Do you see shapes?
  3. How are you able to focus on different things and see them in focus (not blurred)? Which parts of the eye are responsible for this?
  4. Why is something upside down projected on your retina?
Picture

The skin

Skin
Schematic drawing of a cross section of the skin
A. Epidermis
The outermost layer, a waterproof barrier and contains the pigments of our skin tone. 

B. Dermis
Contains connective tissue, sweat glands and hair follicles.

C. Hypodermis or subcutaneous layer
Contains fat and connective tissue.
  1. Blood vessels
  2. Pain receptor
  3. Receptor for light touch
  4. Fat / adipose tissue
  5. Hair
  6. Pore of sweat gland duct
  7. Muscle (connected to a hear)
  8. Oil gland
  9. Hair follicle
  10. Sweat gland duct
  11. Sweat gland
  12. Receptor for pressure
Not shown: receptors for cold and receptors for warmth


The tongue

Picture
A taste bud consists of multiple receptors (sensory cells)


The nose

Picture
The nose and its receptor cells: 1. olfactory bulb (part of the brain) 2. neurones 3. bone 4. nasal cells 5. connections 6. olfactory receptor cells

The ear

Picture

Back to the 3rd form
Credits pictures:
Skin: wikipedia
Tongue: wikipedia
Nose: wikipedia
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