restaurant in invokes
our
, TYPES OF SKELETONS
www.a~S/&eIetcn-&
hey
•
soft bodied invertebrates →
supported by fluid inside their bodies
jellyfish slugs
•
eg : ; sea anemones ; worms ;
•
fluid fills the body cells and cavities in the body →
muscles contract against the fluid ,
setting up a pressure
•
fluid that isn't compressible →
provides excellent support
Fluid has shape animals rely muscles in the body wall to determine their shape
no on
surrounding
•
→
naroeuuourutrarges
•
incredibly flexible →
doesn't require any specialised support tissues
doesn't have any dense substances to heal quickly
→
able to
regenerate
•
lightweight limits amount of
energy required for movement
•
→
nolisaroevourutrarges
•
limits the size to which an animal can
grow
•
limits speed at which animal can move →
generally moves with Ocean currents
protective covering to prevent problem with drying
•
water loss out
body
→
no
exoskeleton ,
•
hard ,
external skeletons that cover the bodies of arthropods
arthropods spiders insects crustaceans ( ie : crabs crayfish )
•
:
, , ,
•
made up of chitin → forms body plates with flexible joints
muscles attached to exoskeleton for controlled
•
→
allow movement
insects have developed wings and
ability to Fly
•
→
very successful
→
as a
group
•
provides good body support + attachment for muscles
naroeuuourutrarges
•
reduces water loss →
evolution allowed arthropods to move out of water + onto land
thin flexible for quick movements
t
joints allows
•
→
Offers protection for entire animal from
injury
•
↳ chitin maintains skeleton
wounds don't heal : continuous + quick secretion of
, rohswoewouwtrarges.chit.in
can't grow / stretch →
animal has to moult to
grow
↳
left w/o exoskeleton when
moulting t vulnerable to predators
size is limited animal must limits animal 's movements large energy
•
→
remain reasonably small as a large exoskeleton is heavy ,
+ uses
quantities
three-week
•
inside the body
found in vertebrates vertebrates belong to
group called chordates
•
→
•
vertebral column →
made either of
cartilage / bone
→ surrounds 1- protects central nerve cord
naroeuuarrutrarges
development of joints at ends of bones → Flexible
body
•
tissues of skeleton
larger size animal
→
to
can
grow much
grow as
grows
•
protects internal organs from
injury
•
•
provides more structural support as well as more muscle attachment positions
↳ improves muscle power by optimising use of
energy expenditure
rolisaroevourutrarges
long time to repair when damaged
•
takes a
protection to external
•
doesn't offer body parts .
evolution ,
during evolution : animals
moving onto land from sea changed a lot
•
↳ development for terrestrial based
of support system lifestyle
•
terrestrial locomotion → needed to develop limbs for
moving on land
•
human skeleton is adapted to terrestrial
lifestyle
our
, TYPES OF SKELETONS
www.a~S/&eIetcn-&
hey
•
soft bodied invertebrates →
supported by fluid inside their bodies
jellyfish slugs
•
eg : ; sea anemones ; worms ;
•
fluid fills the body cells and cavities in the body →
muscles contract against the fluid ,
setting up a pressure
•
fluid that isn't compressible →
provides excellent support
Fluid has shape animals rely muscles in the body wall to determine their shape
no on
surrounding
•
→
naroeuuourutrarges
•
incredibly flexible →
doesn't require any specialised support tissues
doesn't have any dense substances to heal quickly
→
able to
regenerate
•
lightweight limits amount of
energy required for movement
•
→
nolisaroevourutrarges
•
limits the size to which an animal can
grow
•
limits speed at which animal can move →
generally moves with Ocean currents
protective covering to prevent problem with drying
•
water loss out
body
→
no
exoskeleton ,
•
hard ,
external skeletons that cover the bodies of arthropods
arthropods spiders insects crustaceans ( ie : crabs crayfish )
•
:
, , ,
•
made up of chitin → forms body plates with flexible joints
muscles attached to exoskeleton for controlled
•
→
allow movement
insects have developed wings and
ability to Fly
•
→
very successful
→
as a
group
•
provides good body support + attachment for muscles
naroeuuourutrarges
•
reduces water loss →
evolution allowed arthropods to move out of water + onto land
thin flexible for quick movements
t
joints allows
•
→
Offers protection for entire animal from
injury
•
↳ chitin maintains skeleton
wounds don't heal : continuous + quick secretion of
, rohswoewouwtrarges.chit.in
can't grow / stretch →
animal has to moult to
grow
↳
left w/o exoskeleton when
moulting t vulnerable to predators
size is limited animal must limits animal 's movements large energy
•
→
remain reasonably small as a large exoskeleton is heavy ,
+ uses
quantities
three-week
•
inside the body
found in vertebrates vertebrates belong to
group called chordates
•
→
•
vertebral column →
made either of
cartilage / bone
→ surrounds 1- protects central nerve cord
naroeuuarrutrarges
development of joints at ends of bones → Flexible
body
•
tissues of skeleton
larger size animal
→
to
can
grow much
grow as
grows
•
protects internal organs from
injury
•
•
provides more structural support as well as more muscle attachment positions
↳ improves muscle power by optimising use of
energy expenditure
rolisaroevourutrarges
long time to repair when damaged
•
takes a
protection to external
•
doesn't offer body parts .
evolution ,
during evolution : animals
moving onto land from sea changed a lot
•
↳ development for terrestrial based
of support system lifestyle
•
terrestrial locomotion → needed to develop limbs for
moving on land
•
human skeleton is adapted to terrestrial
lifestyle
