CN202126790U

CN202126790U - Polyp external feature model for biology teaching

Info

Publication number: CN202126790U
Application number: CN2011201070431U
Authority: CN
Inventors: 张秀芳
Original assignee: Shandong University of Technology
Current assignee: Shandong University of Technology
Priority date: 2011-04-13
Filing date: 2011-04-13
Publication date: 2012-01-25
Anticipated expiration: 2021-04-13

Abstract

The utility model discloses a polyp external feature model for biology teaching, which belongs to the technical field of teaching aids and learning aids, and is characterized in that tentacles (1), a body (2), a bud (3), a mouth part (5) and germen (6) of a polyp can be seen by only one polyp external feature model. The polyp external feature model is made of iron wires, sponge and wood plates, thus being easy to obtain materials and having a low production cost. The polyp external feature model has a simple structure, is scientific and reasonable and has a vivid image. With the teaching model adopted, a teacher can explain the biological shape and properties of the polyp intuitively in class, thereby improving the teaching effect.

Description

Bioconversion medium is with hydra formalness model

Technical field

The utility model relates to the hydra formalness model that a kind of middle school teaching is used, and belongs to the teaching aid technical field.

Background technology

Hydra (Hydra) belongs to Coelenterata Hydrozoa Hydroidea; The overwhelming majority lives in the seawater, and minority is lived in the fresh water, and the collection of sample is also very difficult; The student of hinterland is difficult to see hydra sample alive, and imparting knowledge to students by the hydra model seems even more important.Have a relevant patented technology, " biological hydra teaching mode " (01277358.1) on the home market at present.This fabrication techniques is simple, and is directly perceived.But oral area, sprout, spermary, the ovary with hydra do not show.The hydra fecundity is very strong, when, water temperature good at nutritional condition is suitable, carries out gemmation, and is less at food, when water temperature is low, and hydra carries out zoogamy.And when forming ovary or spermary, still can sprout and grow.We think and when its formalness of performance, are necessary sprout, gonad (ovary or spermary) are showed.Moreover hydra belongs to has a mouthful no anus, and this is very important characteristics of coelenterate, when its formalness of statement, also is necessary its oral area is showed.Given this, I improve original technology.

Summary of the invention

The purpose of the utility model is to provide the teaching of a kind of lifelike image, advantages of simple and low production cost to use the hydra model.

The main solution of the utility model is achieved in that design 6-8 bar hydra tentacle, and the tentacle of hydra is wrapping iron wire by sponge strip and forming; The iron wire of making tentacle is screwed in together, and the thicker sponge of outsourcing is made into the body of hydra, when making body, that used sponge strip will be cut into is narrow, in wide, time narrow style.

The utility model is fixed on body on the plank base, and the base portion that a more circular sponge is bonded at tentacle is done the oral area of hydra.

The utility model is made the little hydra of same shape, is fixed in following 1/3 place of big hydra body with the iron wire of the inside, is to be sprout.

The utility model is cut a semi-circular sponge and is done gonad (ovary or spermary), sticks on the opposite of sprout.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment;

Among the figure: 1. tentacle, 2. hydra body, 3. sprout (microhydra), 4 base plates, 5. oral area, 6. gonad (ovary or spermary)

Embodiment

As shown in Figure 1, make the tentacle of hydra with the thin sponge of iron wire outsourcing, such tentacle is 6-8.The base portion of the iron wire of doing tentacle is screwed in together, wrap outward narrow, in wide, down narrow thick sponge strip make the body of hydra.

The hydra body is fixed on the plank base, and the base portion that a more circular sponge is bonded at tentacle is done the oral area of hydra.

The microhydra of another same shape is fixed on following 1/3 place of big hydra body, is to be sprout.

Cut a semi-circular sponge and do gonad (ovary or spermary), stick on the opposite of sprout.

In the utility model, material therefor is iron wire, sponge and plank, draws materials easily, makes simple, with low cost.With original compared with techniques, added sprout, gonad (ovary or spermary), oral area, make model more scientific and reasonable, be fit to biology teaching in junior middle school and use.

Claims

1. a bioconversion medium is with hydra formalness model; Tentacle, body, sprout, oral area and the gonad and the base that comprise hydra; The tentacle that it is characterized in that hydra is wrapping iron wire by sponge strip and is forming; The iron wire that to make tentacle then is screwed in the body that the thicker sponge of outsourcing together is made into hydra, body is fixed on the plank base again, and the base portion that a circular sponge is bonded at tentacle is done the oral area of hydra.

2. bioconversion medium according to claim 1 is characterized in that with hydra formalness model said sprout is the microhydra that is fixed on 1/3 place under the big hydra body.