Transcript Body Areas - AaronFreeman

Animal Kingdom
Basics
Body Areas
Back
Tail end
Head
Belly
Symmetry: Arrangement of the body
parts around a central axis
Asymmetry
Body that cannot be
divided into equal
parts
Radial Symmetry
Body arranged around
a central axis
Bilateral Symmetry
Body that can be
divided into equal
halves
Identify the following
examples of symmetry as
asymmetrical, radial, or
bilateral
External Segmentation
Segments located on the outside of the body
Internal Segmentation
Segments located on the inside of the body
Skeletal System
Provides structure and support for animals
Exoskeleton
Skeleton on the outside of the body;
external skeleton
*
Endoskeleton
Skeleton on the inside of the body;
internal skeleton
Hydrostatic skeleton
Fluid-filled cavity surrounded by muscles;
fluid provides support
Digestive System
Breaks down food into energy
Two-way Digestion*
One
opening;
food goes in
out the same
opening;
moves in two
directions
One-way Digestion
Two openings; Food goes in the “mouth”
and out the “anus”; moves in one direction
Circulatory System
Transports oxygen throughout an organism
Closed Circulatory System
Blood moves throughout an organism closed
within blood vessels
Open Circulatory System
“Blood”
moves
openly
throughout
an
organism;
No vessels
Respiratory System
Exchange gases; Oxygen is taken in and
Carbon Dioxide is released.
Diffusion
Oxygen moves across a thin membrane;
carbon dioxide is release
Gills
Feather-like structures that take in
dissolved oxygen from aquatic
environments; releases carbon dioxide
Lungs
Organ found in
animals that take
in oxygen from
the atmosphere;
releases carbon
dioxide
Nervous System
Transmits signals throughout an organism;
allows a response to a stimulus
Nerve Net
Net of nerves that spreads throughout an
organism; lacks a control center
Nerve Cell
Control center; nerve cords extend
throughout body; receive and carry messages
Integument
Outermost layer of an animal; functions in
protection from dehydration, freezing, etc.
Excretory System
Gets rid of waste in an organism
Reproductive System
Produces offspring
Budding
Offspring grows from parent; Asexual
reproduction; Identical to parent
Fragmentation
An organism is broken into pieces; the pieces
grow into a new organism
Hermaphrodite
Both sexes are present; produce sperm/egg
External Fertilization
Union of the egg and sperm outside of the
organism
Internal Fertilization
Union of egg and sperm on the inside of an
organism