Download General Characteristics

WELCOME
Dr. Mohammad Nurul Hoque
Head of The Department
Department of Science
English Version
Cambrian School & College
In how many classes soaps can be divided
according characteristics?
Toilet soap
Detergent
Laundry
তরল সাবান
Do
they
have
same
structure?
Do
Do
they
they
move
take
in
same
same
food?
way?are there?
live
Do
they
in
same
look
environment?
alike?
Do you know
how
many
types
of
species
Do
they
have
backbone?
Classification of Animal Kingdom
Chapter: ONE Lesson: 1-3
Lesson Outcome
After this lesson students will able to…
 Say about classification
 Say the characteristics of porifera
 Say about characteristics of cnidarian and
nematode
Important words
1. Classification
2. Taxonomy
3. Binomial
4. Species
5. Sponge
Classification
The systemic arrangement of living world into
different
categories
according
to
different
characteristics is called classification.
Classification is the only way to know the structure and
nature of such huge number of animals. Morphological
characteristics of the animal, similarity and dissimilarity
among them and their interrelationship are the basis of
classification.
Porifera
General Characteristics
(1) They are simplest multicellular animal.
(2) Body wall with numerous pores. Through these
pores food and oxygen enters into the body.
(3) There is no compact tissue, organ and organ
system.
Examples: Spongilla, Scypha
Spongilla
Scypha
Pores
Let watch a video
Cnideria
General Characteristics
(1) Body consists of two embryonic layers. The
outer one is ectoderm and the inner one is
endoderm.
(2) Their body cavity is known as coelenteron.
It helps in digestion and circulation.
(3) Ectoderm bears a special type of cells called
cnidoblast. These cells help in locomotion, defense,
capture of prey etc.
Example: Hydra, Obelia
Hydra
Obelia
Let watch a video
Body Structure of Hydra
Platyhelminthes
General characteristics
(1) Body is flat, bisexual and mostly parasitic.
(2) Body is covered with cuticle.
(3) Body bears sucker and hooks.
Example: Liver Fluke, Tape Worm
Liver Fluke
Cuticle
Nematoda
General characteristics
(1) Body is tubular (cylindrical) and covered with
thick skin.
(2) Digestive system is complete. Mouth and anus
are present.
(3) Respiratory and circulatory system are absent.
(4) Generally unisexual.
(5) Body cavity is without lining and true coelom is
absent.
Example: Round worm, filaria worm.
Round Worm
Class Work
Find out the selected MCQ’s answer from book and
Mark the lines in the book
Feedback
1. What is classification?
2. How many types of classifications of
Animal Kingdom?
3. What is the main characteristic of porifera?
Home Work
Question 1: What is called binomial or scientific
name?
Question 2: What is the scientific name of man?
Question 3: Which phylum previously known as
coelenterata?
Question 4: What is sponge?
Question 5: Why classification is necessary?
Thank You