Download CHAPTER 7

CHAPTER 7
Animal classification
 Key science words
vertebrate
invertebrate
symmetry

TRAITS OF ANIMALS

Animals are ____________



Must take in ________________ their surroundings
Some animals eat plants, others eat other animals
Animals ________and store food in their bodies
Most animals can ________ from place to place
 Animals are multicellular organisms



Cells are __________ into tissues and __________ that form
systems
Most animals have a _________, digestive, and
______________ system
TWO GROUPS OF ANIMALS
Vertebrates
animals with __________

fish, ____________, reptiles, birds

Invertebrates

animals without a _____________

worms, and _______________

SYMMETRY
______________ ARRAINGEMENT OF BODY PARTS
AROUND A _____________ OR ALONG A CENTER LINE
 Two types of symmetry


____________

Bilateral
SYMMETRY

Radial


Body parts are arranged in a __________ around a central
________
Ex. A sea anemone fig 7-1b
SYMMETRY

Bilateral



The body can be ________ ______________ into two equal
sides, a right ______ and a left side
This includes all vertebrates and some invertebrates
The animal must have a ______ and a tail end, and an upper
and ______ half
REVIEW OF TRAITS
1.
 2.
 3.
 4.

Animals can’t make food, they must catch it and eat it
Most animals can move from place to place
Animals have many cells
Most animals have some type of symmetry
9 MAJOR GROUPS
OF CLASSIFICATION
Sponges, stinging celled animals, 3 worm phyla, softbodied animals, jointed-leg animals, spiny skinned animals,
chordates
 Sponges are the smallest phyla, jointed- leg animals are
the largest, refer to fig. 7-2

SPONGES AND STINGING-CELLED ANIMALS




Simple ____________
Have pores
Do not _______ on their own
Live in salt and fresh water

Water comes in through the _______ and out through a hole at
the ______ center of the body, food from the water gets trapped
by food getting cells inside the body
SPONGES CONT.
______ cell layers thick
 Have no muscles or nerve cells
 No tissues, _________, or organ systems
 Reproduce ________ or asexually, by egg and sperm, or
by budding
 Sponges are asymmetrical __________ symmetry

STINGING-CELLED ANIMALS
Animals with __________ cells
 Hollow sac-like bodies
 Lack ________
 Live in the ocean and in fresh water
 Examples: jellyfish, _______, sea fan

Stinging-celled cont.
Have arm-like parts call tentacles that surround the mouth
 Have _________ symmetry
 A body cavity contains an opening called the ________
 It’s the only way into and out of the body

Stinging-celled cont
Attach themselves to the ocean bottom with or to rocks
with a structure called a disc
 Do not ______ from place to place
 How do they catch their food?
 With their __________

Tentacles contain poison darts that stuns the animal that
touches them
 Food enters through the _________ and undigested food
leaves through the ___________
 Reproduce sexually and asexually

WORMS
Worms are ____________
 3 phyla---_____________, _______________, segmented
worms

FLATWORMS
Simplest worms
 Flat body, 3 layers of cells, ________, middle, and a thick
middle layer
 Most ___________ are parasites
 Parasites live in or on other living things getting food from
them (called the host)

TAPEWORM
Flat ______________ body divided into sections
 Live in the __________ of almost any kind of vertebrate
 Have suckers and _________ that hold onto the sides of
the intestine
 They _________ food that has already been digested

TAPEWORM CONT.
Tapeworms in humans are not as common as in other
countries
 In the us waste is treated with chemicals at sewage plants
 Meat is inspected for _______
 However always cook your meat well
 Copy down the life-cycle of a tapeworm into your notes pg
143

ROUNDWORMS
Have long bodies with __________ ends
 ____ layers of cells
 Some cannot be seen without a microscope
 Many are __________
 Hosts are people, dogs, cats, plants

ROUNDWORMS CONT
Found in the _______
 ____________ are parasites of people, they enter through
the skin of the feet, once inside they move to the
intestine, and feed on the hosts _________
 Refer to figure 7-11

ROUNDWORMS CONT
Have long __________ bodies
 Has a _______ and an ______ (first animal to have a 2
way gut)
 First animal to have an intestine
 Males and _________ are separate animals, first animal to
have separate sexes

SEGMENTED WORMS
Bodies divided into sections called __________
 3 cell layers
 Most __________ of the worms
 Live in salt water, fresh water and on land
 Ex: leech, earthworm

SEGMENTED WORMS CONT





Segments have _________
Have a ________ and an ________
Has an intestine
Two blood ___________
5 pairs of simple ________ that carry oxygen and food to all the
cells


Has nerves and a simple _________
Separate sexes
SOFT-BODIES ANIMALS
Soft body protected by a ______ shell
 Body covered by a thin fleshy tissue called a
_______(mantle makes the shell)
 Have a ____________ foot for moving
 Have a head with a mouth with _________

1st CLASS OF SOFT-BODIED ANIMALS
Snails and _______
 Live on land and in the water
 ______ using a muscular foot
 snails(shell) slugs(no shell)
 Snail has two ___________ (sense organs)
 Contain eyes that detect light

2nd class
Clams, oysters, scallops
 Have two ________ that fit together
 Have a muscular foot
 Live buried in the sand and ________ water to get food

3rd class
Octopus, squid, cuttlefish
 Squid, cuttlefish have ___________ inside their bodies
 _____________ has no shell
 Have tentacles surrounding the head
 Well _____________ eyes
 Rapid swimmers

Features of soft-bodied animals review
1 all are ____________
 2 soft ______ covered by a __________

3 most have 1 or 2 external ________, or an internal shell
 4 most have a ______ by which they ______ about
