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Introduction to Animals

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Information about Introduction to Animals
Education

Published on September 24, 2008

Author: erinNly

Source: slideshare.net

Description

This PowerPoint is used as an introduction to animals characteristics in my High School Honors Zoology Class.
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*List as many characteristics as you can that define something as an “ANIMAL”...

CHARACTERISTICS of ANIMALS *to be an “animal” it must:

MOVE MULTICELLULAR EAT (use energy)

MOVE

MULTICELLULAR

EAT (use energy)

“ BREATHE” GROW REPRODUCE

“ BREATHE”

GROW

REPRODUCE

RESPOND to a STIMULUS STORE ENERGY as GLYCOGEN ?????????

RESPOND to a STIMULUS

STORE ENERGY as GLYCOGEN

?????????

MOTILE: *the ability to MOVE by...

“ limbs” = walking “ fins” = swimming

“ limbs” = walking

“ wings” = flying “ false foot” = ??? (pseudopod)

“ wings” = flying

WHEN did animals 1st appear on Earth?: 700-800 M.Y. ago

VERTEBRATES vs. INVERTEBRATES *presence of a backbone

BODY SYMMETRY

RADIAL SYMMETRY => “ circular” starfish, jellyfish, marine worms tend to be slow

“ circular”

starfish, jellyfish, marine worms

tend to be slow

Have a TOP or “DORSAL” surface have a BOTTOM or “VENTRAL” surface

Have a TOP or “DORSAL” surface

have a BOTTOM or “VENTRAL” surface

“ ventral” “ dorsal”

 

 

BILATERAL SYMMETRY => fast-moving also have “dorsal” & “ventral” side

fast-moving

also have “dorsal” & “ventral” side

Has an ANTERIOR or “front” has a POSTERIOR or “back”

Has an ANTERIOR or “front”

has a POSTERIOR or “back”

 

has a “left” & “right” *more complex/ advanced than radials

has a “left” & “right”

 

Tissue Development

EGG + SPERM = ZYGOTE

ZYGOTE “ cleavage”

ZYGOTE etc... BLASTULA

ZYGOTE etc... *certain cells move inward

GASTRULA “ ectoderm” “ blastopore” “ endoderm”

* DEUTEROSTOMES: (blastopore ---> anus) *PROTOSTOMES: (blastopore ---> mouth)

3 cell layers form in most animals: * ENDODERM (inner) -dig. tract, resp. system * MESODERM (middle) -circ. system, muscles, rep. system, exc. system * ECTODERM (outer) -skin, nerves, sense organs

* ENDODERM (inner)

-dig. tract, resp. system

* MESODERM (middle)

-circ. system, muscles,

rep. system, exc. system

* ECTODERM (outer)

-skin, nerves, sense organs

 

Support & Movement Systems - (3)

I. HYDROSTATIC skeleton: *muscles that surround & are supported by water (roundworms & earthworms)

II. EXOSKELETON: * “hard shell”… muscles att. to the inside of shell (insects & crustaceans) * limits mobility & growth

III. ENDOSKELETON: * rigid framework inside an animal (protects less) (vertebrates/humans) * allows movement & growth

DIGESTIVE SYSTEMS

I. MOST PRIMITIVE *A cavity where food is partially digested before moved into cells to complete the process (flatworms)

II. MEDIUM SOPH. *a two-way digestive system *digested & undigested food mix (cnidarians)

III. ADVANCED *food takes a one-way path *w/ special cells to absorb nutrients (fish)

REPRODUCTIVE SYSTEMS

*Nearly ALL animals are capable of sexual reproduction.

hermaphrodite (An advantage for members of small populations that seldom encounter others of the same sp.) *An animal w/ fully functioning male & female rep. structures is a:

* timed gamete production *

Asexual

sexual

 

NICHE

Species Interactions - Symbiosis Mutualism - both species benefit from the relationship

Mutualism - both species benefit from the relationship

Species Interactions - Symbiosis Commensalism - one species benefits from the relationship while the other is not affected

Commensalism - one species benefits from the relationship while the other is not affected

Species Interactions - Symbiosis Parasitism - one species benefits from the relationship while the other is harmed

Parasitism - one species benefits from the relationship while the other is harmed

 

 

*The End*

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