Changes that occur in our internal and external environment
Sensory receptor
Nerve endings or sense organs
Exteroceptors
External receptors
Interoceptors
Internal receptors
Receptors
Mechanoreceptors
Photoreceptors
Chemoreceptors
Nocireceptors
Thermoreceptors
The sound vibrates through the air, enters our ear and makes it vibrate. This vibration allows us to make nerve impulses that go to our brain and our brain interprets.
Types of balance
Dynamic balance
Static balance
Dynamic balance
Controls movements like walking and running
Controlled by three semicircular canals full of endolymph
Sensory cells make nerve impulses and send them to the brain
Static balance
Ability to keep our body in the same position when we are not moving
Utricle (in the horizontal plane) and saccule (in the vertical plane) detect if we are sitting, standing
The tongue is responsible for our sense of taste. The surface of the tongue is covered in taste buds that group together to form papillae. The taste buds contain chemoreceptors that detect substances in foods that are dissolved in saliva.
Parts of the eye
Pupil
Iris
Lens
Retina
Optic nerve and retina blood vessels
Cornea
Sclera
Choroid
Optic disc (blind spot)
Macula lutea
Vitreous body
Anterior chamber
Types of muscles
Skeletal muscles
Fusiform muscles
Smooth muscles
Skeletal muscles
Cardiac muscle tissue
Long cells with several nuclei called muscle fibres
Types of skeletal muscles
Striated muscles (long and spindle-shaped, related to movement)
Flat muscles (square or fan-shaped, cover organs)
Circular muscles (ring-shaped, open or close ducts or cavities)
