STIMULI A stimulus is anything you see, hear, touch, smell or taste. Stimuli can be internal or external. The body has different receptors: Internal receptors. External receptors. RESPONSES A response is the body’s answer to a stimulus. There are two types of responses, muscular and glandular responses.
SIGHT The eye is the organ of sight.It is made up of the eyeball and protected by the eyebrows,the eyelids and eyelashes. After that light passes through the lens Retina First light goes through the cornea Finally the information in the retina Then light travels to the passes brain through through the the optic pupil Iris nerve.
The nose is the organ of smell. The receptors of smell are in the pituitary gland ,inside the nostrils. pituitary nostrils
The ear is the organ of hearing.it has three parts :the outer ear ,the middle ear ,and the inner ear. The outer ear includes the ear and ear canal. The middle ear includes the eadrum and the small bones. The inner ear includes the cochlea and the auditory nerve.
Auditory eardrum nerve cochleaear Ear canal Small bones
The skin is the The tongue is the organ of touch.it is organ of taste .The made up of three receptors of taste layers. are in the taste epidermis buds.There are taste buds all around the tongue. dermis Taste hypodermis buds
Is made up of nerve centres and nerves. Nerve centres interpret the information and develop responses,forming the central nervous system. The central nervous system has two parts: The brain is inside the skull.It is made up of the cerebrum, cerebellum and the brain stem. The spine cord is made up of many neurons.It is protected by vertebrae. The peripheral nervous system is made up of: Sensory nerves Motor nerves.