unit2 sensitivity and coordination noemi and clara s
TRANSCRIPT
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SENSITIVITY AND COORDINATION
BY NOEMI ALMENA CONTRA AND CLARA HERNANDEZ PEREZ
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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
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•THE SENSES SIGHT.The eye is the organ of sight .It is made up of
eyeball and protected by the eyebrows,eyelids and eyelashes.
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SMELLThe nose is the organ of smell. The
receptors of smell are in the pituitary gland,inside he nostrils.
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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
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TOUCH
The skin is the organ of touch. It is made up of three layers:
.Epidermis
.Dermis
.Hypodermis
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TASTE
.The tongue is the organ of taste.The receptors of taste are in the taste buds.
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THE NERVOUS SYSTEM• The nervous system is made up of nerve
centres and nerves.• The central nervous system:Brain:Cerebrum,cerebellum,brain stem
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NEURONS
Specialised cells called neuronsThey are made up of a cell body , dendrites and axons
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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.
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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
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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 .