بسم هللا الرحمن الرحيم

PRESENTATION ON

INTODUCTION OF ARTHROPOD

Made by /khaled Moamed Ahmed

Under supervision of / prof.Ahmed Kamal Dyab

NAMING

Arthus is a greek word means joint

Podes = foot

This indicates that the members of this phylum

have joint limbs

GENERAL CHARACTERS OF ARTHROPODA

*segmented , bilaterally symmetrical

* Have exoskeleton for protection

* The body is divided externally , but its cavity is

continuous

*body cavity (haemocele) is filled with

blood(haemolymph)

* Internal organs bath in haemolymph

GENERAL CHARACTERS OF ARTHROPODA

* Circulatory system consists of

_pulsing dorsal tube(heart)

_vessles as aorta

* Digestive tract is divided into 3 part

_fore gut :mouth , pharynx , oesophagus ,

proventriculus, salivary glands

_mid gut : stomach

_hind gut :ileum , colon , rectum , open by anus out

side

GENERAL CHARACTERS OF ARTHROPODA

* Respiratory system is formed of

_2 main branching tracheal tubes reach all parts of

body

_opens to outside by respiratory spiracles

* Male external genitalia (aedegus , paired claspers)

* Female external genitalia(spermatheca)

Note that genital organs con be of taxonomic value

VETERINARY IMPORTANCE OF

ARTHROPODA

1- they may cause diseases

2- they may transmit diseases

3- they may cause announcement

4- for medical uses

MODE OF TRANSMISSION OF DISEASES BY

ARTHROPODA

1- Mechanical

2-Biological

MODE OF TRANSMISSION OF DISEASES BY

ARTHROPODA

1- Mecanical :arthropod is a passive

carrier

*contaminative----non biting insects

* Passive carrier---- by their wet

proboscis

MODE OF TRANSMISSION OF DISEASES BY

ARTHROPODA

2- Biological : in this mode arthropod is obligate

vector forming a part of life cycle of parasite or

pathogen

*this may be

a) propagative

b) Cyclopropagative

c) Cyclodevelopmental

d) transovarian

MODE OF TRANSMISSION OF DISEASES BY

ARTHROPODA

a) propagative

- Multiplication without development

- Occur in bacteria , rickettsia , viurus

- e.g yerisenia pestis

b) Cyclopropagative

-multiplication and development

- In all protozoa

MODE OF TRANSMISSION OF DISEASES BY

ARTHROPODA

c) Cyclodevelopmental

- Development only without multiplication

- In all helminthes

d) Transovarian

- Through the egg of arthropod

- e.g babesia , Dipylidium caninum

METAMORPHOSIS OF ARTHROPODS

1- Complete metamorphosis

2- Incomplete metamorphosis

METAMORPHOSIS OF ARTHROPODS

Incomplete

metamorphosis

Complete

metamorphosis

hemimetabolousholometaboloustype

Similar to the adult but

Smaller in size

Paler in color

Sexually immature

Completely different in

morphology

Intermediate stages

(larva , pupa , adult)

Similar differentHabitat and feeding habits

of Intermediate stages

Bugs , ticks , lice Mosquitoes , flies , flease.g

METAMORPHOSIS OF ARTHROPODS

Incomplete metamorphosisComplete metamorphosis

REFERANCES

http://www.slideshare.net/mnajeeb80/entomology-

by-dr-najeeb?related=7

http://www.slideshare.net/qasem7610/entomology?

related=9

http://www.slideshare.net/jamesmacroony/medical-

entomology-41295544?related=1\