8. Locate the digestive tract, which lies below the dorsal blood vessel. Refer to the diagram above to locate the pharynx, esophagus, crop, gizzard, and intestine. 9. To find organs of the nervous system, push aside the digestive and circulatory system organs. Use the diagram below to loca...
The dorsal blood vessel is located at the back of the body. The seminal vesicles are small hollow organs that carry sperm. The lateral heart is a blood-pumping system. An earthworm has five aortic arches that together function as a heart and circulate blood through its body. The ventral ...
The dorsal blood vessel (X) appears as a dark brownish-red vessel running along the intestine. The heart or aortic arches (Y) can be found over the esophagus (just posterior to the pharynx). Carefully tease away the tissues to expose the arches of the heart, the run across the worm. ...
3. 3. Chloragogen tissue from the vicinity of the dorsal blood vessel also contains components of the luminescent system. 4. 4. Attempts to isolate the subcellular component containing the packaged luminescence system were partially successful in that a low density, active fraction was obtained, ...
Earthworms are simple invertebrates, but they have closed circulatory systems. Earthworms have several pairs of aortic arches which act like hearts, a large dorsal blood vessel, a ventral blood vessel, and several supporting vessels. Do worms have a circulatory system?
The dorsal surface of the body is marked by the presence of a dark median line of a dorsal blood vessel that runs throughout the body just below the skin. The ventral surface is marked by the presence of genital openings and papillae in the anterior parts of the body. ...
Make your way back up to the crop. If you look above the crop on the anterior side, you’ll find five pairs of aortic arches. This is the worm’s version of a heart. The hearts are located around the esophagus, and they connect to the dorsal blood vessel. That’s the worm’s ver...
a2. Place earthworm in the dissecting tray & rinse off the excess preservative. Identify the dorsal side, which is the worm’s rounded top, and the ventral side, which is its flattened bottom. Turn the worm ventral side up, as shown in the diagram below. 1.戴上安全风镜,手套,一个实验室...
EARTHWORM RAISING VESSEL 优质文献 相似文献The Fine Structure of Some Blood Vessels of the Earthworm, Eisenia foetida The fine structure of the main dorsal and ventral circulatory trunks and of the subneural vessels and capillaries of the ventral nerve cord of the earthwor... ...