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