I only need a very short answers please Prepared Slide 1. Obtain a prepared slid
ID: 214068 • Letter: I
Question
I only need a very short answers please Prepared Slide 1. Obtain a prepared slide of a cross section of an earthworm (Fig. 17.10). Examine the slide under the dissecting microscope and under the light microscope. 2. Identify the following structures a. Body wall: A thick outer circle of tissue, consisting of the cuticle and the epidermis. b. Coelom: A relatively clear space with scattered fragments of tissue. c. Intestine: An inner circle with a suspended fold. d. Typhlosole: A fold that increases the intestine's surface area. e. Ventral nerve cord: A white, threadlike structure. 3. Does the typhlosole help in nutrient absorption? Explain your answer Figure 17.10 Cross section of an earthworm. Cross-section side as it would appear under the microscope. O Carolira Bolagical Supply CompenyPhatotahe ccular muscle -dorsal blood vessel longtudinal muscle typhlosole nephridium epidermis ventral biood vesse ventral nerve cord 5x Conclusion: Comparison of Clam to Earthworm Complete Table 17.2 to compare the anatomy of a clam to that of an carthworm. Table 17.2 Comparison of Clam to Earthworm Clam Earthworm Habitat (where they live Feeding mode Skeleton Scgmentation Circulation Respiratory organs Locomotion Reproductive organs 17-13 225Explanation / Answer
COMPARISON OF CLAM AND EARTHWORM:
FEATURES CLAM EARTHWORM Habitat aquatic(water) soil Feeding mode food from the incurrent water feeding on live and dead organic matter skeleton exoskeleton or shell no skeleton or pseudo skeleton segmentation mostly rudimentary type of segmentation setae circulation open circulation closed circulation system respiratory organs gills moist skin and capillaries locomotion by locomotion with foot or move by using water currents The circular and longitudinal muscles helps in locomotion. reproductive organs reproduce sexually and also asexually hermaphrodites( The female organs of a worm include the egg sacs and ovaries and The male organs are two pairs of testes, three pairs of seminal vesicles and sperm funnels.