Topic: Flatworms

Июль 26, 2022

Содержание

2. They have soft and flat bodies. They show bilateral symmetry. They have three tissue layers; Ectoderm
3. General characteristics of Flatworms They have bilateral symmetry Mesoderm Endoderm They have 3 tissue layers Ectoderm
4. They are hermaphroditic (can produce both egg and sperm cells). Have ladder-like nerves system. Excretory organs
5. Excretory organs are Flame cells (protonephridia)
6. Types of Flatworms Turbellaria Ex: Planarian 2. Trematoda Ex: Flukes 3. Cestoda Ex: Tapeworm
7. 1. Turbellaria: Characteristics of Planarian Planaria is the most important example. Mostly live in fresh water.
8. Planarian
9. Regeneration of Planaria The ability of an organism to regrow lost parts is called regeneration.
10. Question 1. Which type of nerve system is found in the planarian? A) Central B) Radial
11. Answers 1. Which type of nerve system is found in the planarian? A) Central B) Radial
12. Question: Label the body parts of Planaria
13. Answer
14. 2) Trematoda Example: Flukes Flukes are the most important example. They are parasite on vertebrates and
15. Life cycle of flukes
16. Flukes in the liver
17. 3. Cestoda: Tapeworms Tapeworms are the most important example. They are parasite on vertebrates and human.
18. Body parts of Tapeworm
19. Scolex Have no digestive system but have well developed reproductive system (1 million egg in a
20. Proglottis They have no digestive system but have well developed reproductive system (1 million egg in
21. Life cycle of Tapeworm
22. Questions 1. Which of the following lives in human liver as parasite? A) Flukes B) Tapeworm
24. Скачать презентацию

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They have soft and flat bodies.
They show bilateral symmetry.
They have three

tissue layers;
Ectoderm
Mesoderm
Endoderm

Platyhelminthes (Flat Worms)

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General characteristics of Flatworms
They have bilateral symmetry
Mesoderm
Endoderm
They have 3 tissue layers
Ectoderm

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They are hermaphroditic (can produce both egg and sperm cells).
Have ladder-like

nerves system.
Excretory organs are Flame cells (protonephridia).

They have ladder-like nerves system

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Excretory organs are Flame cells (protonephridia)

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Types of Flatworms
Turbellaria
Ex: Planarian
2. Trematoda
Ex: Flukes
3. Cestoda
Ex: Tapeworm

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1. Turbellaria: Characteristics of Planarian
Planaria is the most important example.
Mostly live

in fresh water.
Have two eye spots.
Have only one opening at the centre serve as mouth and anus.
The ability of regeneration is high.

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Planarian

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Regeneration of Planaria
The ability of an organism to regrow lost parts

is called regeneration.

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Question
1. Which type of nerve system is found in the planarian?
A)

Central B) Radial C) Ladder
D) Ganglial E) Cord
2. Waste materials in the flatworms are excreted by _____________.
A) Kidney B) Nerves C) Neuron
D) Protonephridia E) Proglottis

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Answers
1. Which type of nerve system is found in the planarian?
A)

Central B) Radial C) Ladder
D) Ganglial E) Cord
2. Waste materials in the flatworms are excreted by _____________.
A) Kidney B) Nerves C) Neuron
D) Protonephridia E) Proglottis

C) Ladder

D) Protonephridia

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Question: Label the body parts of Planaria

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Answer

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2) Trematoda
Example: Flukes
Flukes are the most important example.
They are parasite on

vertebrates and human.
They use human and snail as a Host.
Ex: Blood flukes and Liver flukes.

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Life cycle of flukes

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Flukes in the liver

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3. Cestoda: Tapeworms
Tapeworms are the most important example.
They are parasite on

vertebrates and human.
Have 2 body part Scolex (head) and Proglottis (all body segments).
Have hooks and suckers on their scolex to attach the host.

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Body parts of Tapeworm

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Scolex
Have no digestive system but have well developed reproductive system (1

million egg in a day).
Ex: pork, beef, dog and fish tapeworm.
They have hooks and suckers on their Scolex to attach the host.

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Proglottis
They have no digestive system but have well developed reproductive system

(1 million egg in a day)

Proglottis

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Life cycle of Tapeworm

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Questions
1. Which of the following lives in human liver as parasite?
A)

Flukes B) Tapeworm
C) Earthworm D) Ascarida
E) Trichina
2. Which structure produces egg and sperm cells in the tapeworms?
A) Scolex B) Sucker
C) Head D) Hooks
E) Proglottids

Topic: Flatworms

Содержание

They have soft and flat bodies.They show bilateral symmetry.They have three

General characteristics of FlatwormsThey have bilateral symmetryMesodermEndodermThey have 3 tissue layersEctoderm

They are hermaphroditic (can produce both egg and sperm cells).Have ladder-like

Excretory organs are Flame cells (protonephridia)

Types of FlatwormsTurbellaria Ex: Planarian2. TrematodaEx: Flukes3. Cestoda Ex: Tapeworm

1. Turbellaria: Characteristics of PlanarianPlanaria is the most important example.Mostly live

Planarian

Regeneration of PlanariaThe ability of an organism to regrow lost parts

Question1. Which type of nerve system is found in the planarian?A)

Answers1. Which type of nerve system is found in the planarian?A)