2. Support system in humans and animals is
called SKELETON or SKELETAL SYSTEM
ENDOSKELETON
HYDROSTATIC
EXOSKELETON
SKELETON
3 types
of
skeletal
systems
3. HYDROSTATIC
ENDOSKELETON EXOSKELETON
SKELETON
• Inner Frame • Outer Frame • Formed from
• Refers to • Consists of one fluid pressure
bones or layer of hard in space that is
cartilage that is skin derived enveloped by a
inside the body from muscular
of vertebrates substances like system.
calcium
carbonate
4. SUPPORT
MAINTAIN
BODY
BODY SHAPE
WEIGHT
PROTECTS SOFT PROVIDE PLACE
FOR MUSCLE IN
ORGANS INSIDE BODY TO ATTACH
BODY THEMSELVES
ENABLE
LIMBS TO
MOVE
5. SUPPORT BODY MAINTAIN BODY
WEIGHT SHAPE
PROVIDE SURFACE
PROTECT SOFT
FOR MUSCLE TO
TISSUES FROM
ATTACH
DAMAGE
THEMSELVES
ALLOW
MOVEMENT
6.
7. VERTEBRATES INVERTEBRATES
LAND EXOSKELETON
HYDROSTATIC
AQUATIC
SKELETON
8. Entire weight is supported by its endoskeleton.
Skeletal system : bigger and stronger than that
of the aquatic animal vertebrate system.
Bigland animals : Strong and big Pectoral and
Pelvic Girdles to support their body weight
Four-legged animals : Backbone either curve
upwards or downwards. Enables backbone to
withstand any heavy load acting on the animal
10. Birds: Have hollow bones and air spaces
inside so that the body is lighter.
Advantages of hollow bones :
Lighter
Requires less calcium and phosphorous for
its formation.
11. Examples : Whales, dolphins
Smaller and lighter endoskeleton than
land vertebrates.
Pectoral and pelvic support that is
smaller and lighter.
Most of body weight is supported by
buoyancy of the water
12. The buoyancy of the water allows the
size of the aquatic vertebrate animals to
be bigger than land vertebrate animals.
15. Invertebrates are animals that do not have a
backbone.
Its body is supported by:
External skeletal system (exoskeleton)
Body fluids (hydrostatic skeletons)
16. Exoskeleton consists of a layer of hard
skin or shell.
Examples of invertebrates with hard
outer skin :
Crabs, spiders, prawns and
scorpions.
Examples of invertebrates with hard
shell:
Snails, mussels
17. For insects, the exoskeleton is called cuticle.
Cuticle is made of chitin (hard and impermeable to
water)
Cuticle prevent the insects from growing.
18. Leeches, worms and octopus do not
have exoskeleton. Their bodies are
soft.
Use the body fluid (also known as
hydrostatic skeleton system) as
support system.
The body fluids exert a pressure on
their body walls to form a hydrostatic
skeleton.
19.
20. PLANTS
LANDS AQUATIC
NON WOODY
WOODY
(HERBACEOUS
21. WOODY PLANTS
Examples: rubber tree, durian
tree, rambutan tree, and teak tree.
Supported by woody tissues.
Woody tissues
– dense, hard on tree trunk.
– made up of xylem tissues.
Most of the woody plants are tall.
22.
23. WOODY PLANTS
Also supported by special structures
- Buttress roots
- Clasping roots
24. Buttress roots
Examples: durian trees, casuarina trees, and yellow
flame trees.
Occurs at the base of the trunk where the main roots
branch off at the ground surface and enter the soil.
Clasping root
Examples : money plant, certain wild orchid.
Enable a plant to climb by growing around and
clasping its support.
25. Non woody plants
Examples: roses, bougainvillea.
Supported by turgid cells.
26. Non woody plants
Supported by special structures :
Thorns, Tendrils, Prop Roots
(Adventitious Roots)
27. Examples: yam, water lily and lotus.
Supported by water buoyancy.
Have soft stems that have air space and
their leaves broad with stomata on the
surface.
Aquatic plants that live in the water have
fine leaves.