A. Goals :
1. To know the class of Echinodermata 2. To know the structure of Echinodermata
B. Basic Theory
Echinoderms (in greek, echino = hedgehog, derma = skin) is a group of animals that have triopoblastik selomata hallmark of the order in
(endoskeleton) spiked that penetrates the skin. Echinoderms are animals that have habitat in the sea, and his body has radial symmetry. This animal has had a perfect digestive system where food is mouth as the entrance is at the bottom and anus as the rest of the way out is in the upper digestive. Motion system using ambulakral feet, but it is also used to capture foot prey.
Generally Echinoderms have 5 arms, these animals have the ability autotomi, namely the ability to reshape her organs were cut off. As with other aquatic animals, also Echinoderms breathe with gills. The nervous system is a nerve ring surrounding the mouth, and then branched 5 toward each arm owned.
Generative reproduction, ie the fusion of sperm and ovum that will produce a zygote. Movement through the system Mechanism ambulakral legs are as follows: water entering through madreporit then down to the ring canal and into the radial canal, after which the water entered into the legs of the tube, so that the water sprayed hydraulic pressure tube feet emerge from the water and finally the tube feet sticking out, the ampulla attached to objects another so that it can move.
A. Size and shape of the body
Echinoderms body shape is like star, round, flat, elongated round, and such plants.
B. Structure and function of the body
Echinoderms generally thorny, either blunt or pointy short term. Thorn stems in a calcium carbonate plates called testa.Sistem waterways in the body cavity called ambulakral. Ambulakral serves to regulate the movement of body parts sticking out, the feet or legs ambulakral ambulakral tube. Foot ambulakral have digestive isap.sistem tool consists of the mouth, esophagus, stomach, colon, and anus. No excretory system. Gas exchange occurs through small gills that are lengthening the skin. The circulatory system is not well
developed. Echinoderms do respiration and feeding on coelomic.
Echinoderms nervous system consists of nerve center ring and nerve
branches. Echinoderms have no brain. For reproduction Echinodermata there that are hermaphrodites and dioseus.
C. Way of life and habitat
Echinoderms are free-living animals. Food is shellfish, plankton, and organisms die. Basic habitat in sea water, in coastal areas to the deep sea.
D. Reproduction
Echinoderms dioseus ducts are simple reproduction. Fertilization takes place externally. Zygote develops into a ciliated larva bilaterally symmetrical. These animals can also regenerate.
C. Tools and Equipment 1. Light Microscope 2. Preparat
3. A part of Holothuroidea 4. Bayclin
5. Small Tube 6. Pipette 7. Scissors
D. Ways of Working
1. First, we prepare all the necessary tools and equipment. Then, we took samples of Echinodermata (class Holothuroidea) to observe the structure of the animal. The sample we put in a small tube and then we mix with Bayclin so that we get the order the animal to be observed. After we mix the sample with Bayclin,we take the order in which is shaped like a small powders using a pipette. Then, we put on the preparations and observed using a light microscope. We were taking a picture of the image.
And finally, we present all of the data obtained from the study in the form of this paper.
2. We observation all the class of Echinodermata.
E. Result of Observation
1. From the observations can be seen some parts of Echinodermata, among others:
2. From the observations can be seen all the class of Echinodermata, among others:
F. Conclusion
Referens
http://tio-uwais.blogspot.com/2012/05/landasan-teori-echinodermata.html
