Unit2 sensitivity and coordination noemi and clara s
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Transcript of Unit2 sensitivity and coordination noemi and clara s
SENSITIVITY AND COORDINATION
BY NOEMI ALMENA CONTRA AND CLARA HERNANDEZ PEREZ
STIMULUS AND RESPONSES
STIMULI A stimulus is anything you see, hear,touch, smell or taste..Internal stimuli.External stimuli.Internal receptors.External receptors RESPONSESA response is the body´s answer to a stimulusThere are two types:.Muscular responses.Glandular responses
•THE SENSES SIGHT.The eye is the organ of sight .It is made up of
eyeball and protected by the eyebrows,eyelids and eyelashes.
SMELLThe nose is the organ of smell. The
receptors of smell are in the pituitary gland,inside he nostrils.
HEARING
• The ear is the organ of hearing. It has three parts :• 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
TOUCH
The skin is the organ of touch. It is made up of three layers:
.Epidermis
.Dermis
.Hypodermis
TASTE
.The tongue is the organ of taste.The receptors of taste are in the taste buds.
THE NERVOUS SYSTEM• The nervous system is made up of nerve
centres and nerves.• The central nervous system:Brain:Cerebrum,cerebellum,brain stem
NEURONS
Specialised cells called neuronsThey are made up of a cell body , dendrites and axons
VOLUNTARY AND INVOLUNTARY MOVEMENTS
• The brain produces a response in the case of voluntary movements
Involuntary movementsThe spinal cord produces a response in the case
of involuntary movements ..Sensory nerves ..The spinal cord.
THE SKELETON
• The skeleton is made up of all the bones in the body:
• Head bones• Trunk bones• Limb bones JOINTSBones are connected by resistant fibres called
ligaments.There are three types:.Moveable joints .Semi – moveable joints.Fixed joints
THE MUSCULATURE• The musculature is the set of muscles in the body:• Head muscles.• Trunk muscles.• Limb muscles. TENDONSTendons are made of flexible and fibrous tissue. They
connect muscles to bones .