2. STIMULI
Astimulus is anything you
see,touch,smell or taste
Stimuli can be:
Internal stimuli
External stimuli

3. RECEPTORS
 The body has different receptors
to receive different types of
stimulus.
Internal receptors
External receptors

4. RESPONSE
 A response is the body answer to a
stimulus.
There are two different types of
responses:
Muscular response
Glandular response

5. SIGHT
 The eye is the organ of sight

6. SIGHT (2)
 First light goes throught
the cornea
 Then light passes
throught the pupil,the
opening of the iris.
 After that light passes
throught the lens wich
focuses the image on the
retina
 Finally in the retina travels
to the brain throught the
optic nerve.

7. SMELL
 The nose is the organ of smell
The receptors of smell are in the
pituitary gland,inside the nostrils
nostrils

8. HEARING
 The ear is the organ hearing
The outer ear includes the ear and
ear canal
The middle ear includes the
eardrum and the small bones
The inner ear includes the cochlea
and the auditory nerve

9. HEARING (2)
 First the outer ear
receives sounds
 Then the middle ear
changes sounds into
vibrations
 Finally the inner ear
changes vibrations
into nerve impulses
that go to the brain

10. TOUCH AND TASTE
The skin is the Te tonge is the
organ of touch. organ of taste.
It is made up of The receptors
three layers. of taste are in
the taste buds

11. THE NERVOUS SYSTEM
The nervous system is made up of
nerve centers and nerves.
Nerve centers intrerpret the
imformation and develop
response,forming the central
nervous system.

12. PARTS OF CENTRAL NERVOUS
SYSTEM
The central nervous system has
two different parts:
 The brain is inside the skull.it is
made up of the cerebrum,the
cerebrellum and the brain stem
The spinal cord is made up of
many neurons and it is protect by
vertebrates.

13. PARTS OF PARIPHERAL
NERVOUS SYSTEM
The pariphetal nervous system
has two different parts:
Sensory nerves
Motor nerves

14. NEURONS
Both the central and peripheral
nervous system are made up of
specialised cells called neurons.
 cell body axons dentrites

15. VOLUNTARY AND
INVOLUNTARY MOVEMENTS
Our bodies react to stimuli making
voluntary or involuntary movements.
Voluntary movements:the brain
produces a response in the case of
voluntary movements.
Involuntary movements:the spinal
cord produces a response in the case of
involuntary movements.

16. THE SKELETON
 The skeleton is made up of all the
bones of the body.
 Head bones:
skull bones and facial bones
Trunk bones :
spine and rib cage
Limb bones:
upper limb bones and lower limb
bones

18. THE MUSCULATURE
 The musculature is the set of muscles in the body
 Head muscles:
masseter,buccinator and orbicular
Trunk muscles:
sternocleidomastoid,abdominal,pectoral,intercost
al,trapezius
limb muscles:
bicep,tricep,deltoy,quadriceps,gluteus,calf
muscles.