arti arthropoda

8/13/2019 Arti Arthropoda

1/4

DEFINITIONS

Arthropods are the largest phylum in the kingdom Animalia identified approximately 770

thousand species

This arthropods living in the soil, water (both fresh and salt) and live as parasites in the bodies of

animals or plants

CHARACTERISTICS

His body is covered with segmented and outside the framework of the substance chitin

His body consists of the head, chest and body (abdomen)

Sense organs: eyes simple (oseli), compound eyes (facets), chemoreceptors and odorant receptors

Have a complete digestive tract

CLASSIFICATION

Arthropods are grouped into four main classes:

Crustacea (crustaceans)

Myriapoda (millipedes)

Insecta / Hexapoda (insects)

Arachnids (spiders)

Crustacean

This class has kerapas the crustacean shells combined head and chest

Having a tool such as the gland excretion of green

Crustaceans are grouped subclass:

Entamostraca (lower level)

Mala costraca (high level)

Crustacean groups

Entamostraca

Has a small body and transparent

Not berinsang

Usually used as fish meal


2/4

Consists of 4 orders:

1. Branchiopoda: This animal is often called a water flea and is one of the constituent of

zooplankton. Breeding takes place in parthenogenesis

Example: dhapina pulex and asellus aquaticus

2. Ostracoda: live in freshwater and ocean as plankton, small body and can move the antenna

Example: cypriscandida and codona suburdana

3. Copecoda: live in sea water and fresh water and is plankton and parasites, body segmentation is

clear

Example: Argulus indicus

4. Cirripedia: live attached to rocks in the sea

Example: Cyclops

Malacostraca

Consists of three orders:

1. Decapoda: space that lies between the abdomen and Sefalotoraks an egg storage. The outside

of the shrimp's body covered by a hard frame containing chitin

Example: shrimp and crab

2. Stomatopoda: mimic mantis shrimp so called locusts. Two foot long jaws and large useless to

pounce on prey

3. Isopods: freshwater fish usually live as parasite

Reproduction crustacean

- If the females are the third pair of legs

- While the males in the fifth pair of legs

Shrimp growth experienced in ekdisis or skin changes:

1. In the adult shrimp twice a year do ekdisis

2. At the young shrimp having ekdisis two weeks

BLOOD CIRCULATION SYSTEM AND BREATHING crustacean

Circulatory system:


3/4

Crustacean circulatory system is called an open circulatory. Meaning without blood circulating

through the blood vessels. Blood does not contain hemoglobin, but the power hemosianin strapped

him to the O2 (oxygen) is low.

Respiratory System:

Crustaceans generally breathe with gills. Except for very small-bodied crustaceans breathe with

the entire body surface. O2 entry of water into the vessels of the gills, while CO2 diffuses in the

opposite direction. O2ini will be circulated to all grow up without going through the blood vessels.

DIGESTIVE SYSTEM AND Ekskresi crustacean

Digestive system:

Crustaceans have pecernaan perfect system, because in her mouth and anus there. Digestive tract

such as mouth lies in the anterior part of the body, while the esophagus, stomach, intestine and

anus located at the posterior. These animals have a digestive gland or liver is located in the head -

chest on either side of the abdomen.

Ekresi system:

Crustaceans form of food carcasses of small animals and plants. Digestion than the rest discharged

through the anus, is also removed through excretion tool called green glands located in the head.

Antennula movement that serves as a shrimp feed chemosereptor 1973

Wipping,the movement engaged antenula cleaning

Flicking,the disarmament movement in the forward direction antenula

Withdraw,the movement toward disarmament antenula back. This occurs when there is movement

behind the body of shrimp feed.

Rotation,which rotates the antenula movement (rotation). This occurs when there is movement in

the body of the shrimp feed.

Movement in search of shrimp feed in 1987

Movement to feed the silent place

Movement toward the target

Movement antennula quickly whipped up and be done with coarse

Movement by moving towards cleaning the ventral and continue moving downwards (base

antennula).

Motion to withdraw antennula antennula whipped back and then forward

Antennula movement and orient the antenna directly on the target, the source chemoatractant.


4/4

arti arthropoda

Documents