animal characteristics multicellular some reproduce sexually, while others reproduce asexually ...

ANIMAL CHARACTERISTICS Multicellular

Some reproduce sexually, while others reproduce asexually

They are mobile (they can move)

They are heterotrophic (consumers)

Have well developed organs

Divided into two groups1. Vertebrates: animals with a backbone2. Invertebrates: animals without a backbone

HOW ARE ANIMALS LIKE PLANTS?

B

oth are multicellular, eukaryotic organisms

U

ndergo cellular respiration to produce energy• During cellular respiration, the mitochondria take

glucose and oxygen and change them into energy, water, and carbon dioxide

B

oth respond to environmental stimuli

VERTEBRATESA

nimals that have a skull and backbone are called vertebrates.

V

ertebrates can be divided into two groups• Endotherms : warm blooded animals; their body temperature

stays the same no matter what the temperature of the environment is• Ectotherms: cold blooded animals; their body temperature

changes with the temperature of the environment

BODY PLANS

M

ost animals have a balanced

arrangement of parts. This is

called symmetry.

BILATERAL SYMMETRYB

ilateral symmetry means that the animal’s body can be divided into right and left halves which are nearly mirror images of each other.

Animals that have bilateral symmetry only have 1 line of symmetry.

RADIAL SYMMETRY

Animals that have radial symmetry (think radius) have body parts that are arranged in a circle around a center point.

Any line drawn through the animal’s center can divide it into two symmetrical halves.

ASYMMETRYA

nimals with no definite

shape are said to have

asymmetry.

Y

ou cannot draw any

lines of symmetry

through the animal.

MOVEMENTA

nimals have different ways of moving.

The most common structures used for movement are feet, fins, and wings.

Some animals have very specialized structures for movement.

• Starfish use structures called tube feet.

• Squid and octopi use tentacles for movement.

RESPIRATION

R

espiration is the process of obtaining oxygen.

F

ish use gills to obtain oxygen.

M

ost other vertebrates obtain oxygen by using lungs.

REPRODUCTION

Some produce asexually.

• Budding: a new organism grows out of the body of the parent

Others produce sexually.

• External fertilization: fertilization takes place outside the body of the female• requires a wet environment in order for the sperm to

fertilize the egg• Internal fertilization: fertilization takes place inside

the body of the female

RESPONSE TO THE ENVIRONMENT

A

nimals have well developed nervous systems that

allow them to respond to their environment.

DEVELOPMENT

A

nimals go through a variety of developmental stages.

COMPLETE METAMORPHOSISD

uring complete metamorphosis, the fertilized egg becomes a larva, which then changes into a pupa. The adult emerges from the pupal form.

Butterflies undergo complete metamorphosis.

INCOMPLETE METAMORPHOSIS D

uring incomplete (gradual) metamorphosis, the fertilized egg becomes a nymph, which looks like a smaller form of the adult. The nymph, after a series of developmental changes, becomes an adult.

Grasshoppers undergo incomplete metamorphosis.

EXIT SLIP

Answer the following questions on a sheet of

paper. Make sure your name is on your paper.

1. What is another name for cold-blooded?

2. What is another name for warm-blooded?

3. What type of symmetry do humans have?

4. What is one difference between plants and

animals?