Titlebook: Atlas of Animal Anatomy and Histology; Péter Lőw,Kinga Molnár,György Kriska Book 2016 Springer International Publishing Switzerland 2016 C

丰富

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xanthelasma

Dissection of a Crayfish (,), feeding on fish, tadpoles, worms, insects and plants. We can purchase fresh crayfishes from fishing companies supplying restaurants. Alternatively the dissection can be performed on preserved material.

BROW

胎儿

Examination of a Hydrahe inner . (Fig. 1.1). A gelatinous connective tissue layer, the . (mesogloea), lies between the two epithelia. The . opens at one end of the coelenteron and marks the oral end. The mouth is at the tip of a process, the . that elevates it above the oral surface. The opposite pole is the aboral end f

restrain

Examination of a Planarian no body cavity (acoelomate) and lack an anus. One of their groups is the freshwater triclads (.), or planarians. They are large free-living flatworms which are commonly found on the underside of stones or submerged leaves or sticks in freshwater springs, ponds, and streams. Planarians are mobile an

cacophony

Dissection of a Roundworm (,)tremely resistant to chemical treatment. Although it is unlikely, some eggs may survive immersion in preservatives for short periods. To avoid ascariasis (a disease caused by the parasitic roundworm; see life cycle at the end of the chapter), you should keep your hands away from your mouth and nose

使激动

Dissection of the Earthworm (,)row large enough to be used for dissection. There are a number of differences in the number and position of the internal organs which may affect the dissection. It is therefore important to identify the specimen to be used and not to assume that it is a . as described here. Earthworms are chiefly no

Trabeculoplasty

Dissection of a Snail (,)eal themselves up; they hibernate in winter and aestivate in summer. During these periods giant Ghana snail (. sp.) can be purchased from zoos instead. Different species of snails differ slightly internally. The instructions given here should enable the student to dissect any type of snail. Examine

Alveoli

Dissection of a Crayfish (,), feeding on fish, tadpoles, worms, insects and plants. We can purchase fresh crayfishes from fishing companies supplying restaurants. Alternatively the dissection can be performed on preserved material.

主动脉