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.
SMELL The nose is the organ of smellThe receptors of smell are in the pituitary gland,inside the nostrilsnostrils
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
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
TOUCH AND TASTEThe 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
THE NERVOUS SYSTEMThe nervous system is made up of nerve centers and nerves.Nerve centers intrerpret the imformation and develop response,forming the central nervous system.
PARTS OF CENTRAL NERVOUSSYSTEMThe 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.
PARTS OF PARIPHERALNERVOUS SYSTEMThe pariphetal nervous system has two different parts: Sensory nerves Motor nerves
NEURONSBoth the central and peripheral nervous system are made up of specialised cells called neurons. cell body axons dentrites
VOLUNTARY ANDINVOLUNTARY MOVEMENTSOur 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 spinalcord produces a response in the case ofinvoluntary movements.
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
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.