All animals share key characteristics: they are multicellular and eukaryotic, reproduce sexually or asexually, have specialized tissues and organs, can move, and are consumers that obtain energy and nutrients by eating other organisms or their products. Animals come in over 1 million identified species ranging dramatically in size from microscopic invertebrates to whales, and include vertebrates like mammals and fish as well as invertebrates like insects and jellyfish.
hi, I am sujon I just completed graduate at International University of Business Agriculture and Technology in Bangladesh Department of Mechanical Engineering
hi, I am sujon I just completed graduate at International University of Business Agriculture and Technology in Bangladesh Department of Mechanical Engineering
Magnets,Magnetic and Non-magnetic Materials, Poles of a magnet, Directions using poles of a magnet,
Making a artificial magnet , Attraction an repulsion between magnets,
Classifying Life
The Three Domains of Life
Bacteria
Archaea
Protists
Plants
Moving Water Up a Tree
Fungi
Animals
How Birds Fly
Viruses and Prions
Science and Society: Swine Flu
Types of Changes ;Physical and chemical changes;Factors affecting changes ;Solubility and factors affecting it
Balanced diet; diseases and disabilities due to food deficiencies.
Carbohydrates, fats, proteins, vitamins, minerals, fibres, their sources and significance for human health
Balanced diet; diseases and disabilities due to food deficiencies.
2. What is an Animal?
When you think of
“animals”, what
pops in your
mind?
Lions and
tigers and
bears, oh my!
3. • But would you think of a sponge???
• The natural sponges that people
use for washing are the remains
of an animal
• Animals come in many
shapes and sizes
• Some are too small to be seen without a
microscope and others are bigger than a
school bus
• They are all part of the animal kingdom
5. • You may be surprised to learn that feather
stars and corals are animals
• Spiders, fish, and birds are also animals
• And slugs, kangaroos, and monkeys are
animals, too
• Scientists have identified more than 1
million species of animals
• Scientists believe that more than 3 million
species of animals live on Earth, and most
have not yet been named
6. Vertebrates
• Vertebrate: an animal
that has a backbone
• Includes fish,
amphibians, reptiles,
birds, and mammals
• Humans are one of
about 5,000 species of
mammals
7. Invertebrates
• You are probably more familiar with
vertebrates than invertebrates, but
vertebrates are definitely the minority
among living things
• Less than 5% of known animal species
are vertebrates
• Most animal species are insects, snails,
jellyfish, worms, and other invertebrates
8. • In fact, beetles make up more
than 30% of all animal species!
9. Animal Characteristics
All animals share characteristics that set them
apart from all other living things:
1. Multicellular Makeup:
– All animals are multicellular, which means made
up of many cells
– Eukaryotic, which means they have a nucleus
– Animal cells do NOT have a cell wall
– Surrounded only by cell membranes
10. 2. Reproduction and Development
– Almost all animals reproduce sexually
– These animals make sex cells: sperm
and egg
– When egg and sperm join, they form the
first cell of a new organism, which then
divides into many cells to form an
embryo
– Embryo: an organism at an early stage
of development
– Asexual reproduction- hydra
reproduce by budding
11.
12. 3. Many Specialized Parts
– Animal’s body has distinct parts that do
different things
– When a fertilized egg cell divides into many
cells to form an embryo, the cells become
different from each other
– Some cells may become skin cells, muscle
cells, nerve cells, or bone cells
– These different kinds of cells form tissues,
which are collections of similar cells
– Tissues then form organs
13. – Organ: group of tissues that carry out a
special function of the body
– Your heart, lungs, and kidneys are all
organs
14. 4. Movement
– Most animals can move from place to place
– They may fly, run, swim, or jump
– Nearly all animals use movement to search
for food, shelter, or mates at some stage in
life
– Can be less active during certain stages
sea anemones swim through ocean while
young, then cling to rocks as adults
15. 5. Consuming
• Animals cannot make their own food
• All animals survive by eating other
organisms or parts and products of
other organisms
• Animals are consumers an
organism that eats other organisms
• This trait sets animals apart from plants
(there are only a few exceptions of
plants that eat other organisms)
16. – Animals eat a great variety of foods
– Examples: pandas eat bamboo
17. – Spiders eat other
animals
– Butterflies drink
nectar from
flowers