H and K Exercise 11 Nematoda

Flashcards for Nematoda lecture notes.

Nematoda

Phylum of parasitic organisms that can be infectious if lab protocols are not followed.

Student Learning Outcome 1

To be able to describe structures and functions of and be able to recognize and explain the taxonomic classification of different live, preserved, and prepared slides of Phylum Nematoda.

Student Learning Outcome 2

To be able to determine, describe, and explain various behaviors of live nematodes.

Student Learning Outcome 3

To be able to recognize differences, identify, and distinguish structures in male and female Ascaris, both in dissected specimens and in prepared slides.

Student Learning Outcome 4

To be able to and explain the what, how, and why of subculturing C. elegans, and to calculate a chemotaxis index, and present/discuss results of a chemotaxis assay.

Nematoda Characteristics

Coelomates with coeloms not fully lined with mesoderm

Functions of Body Cavity

Room for organ development, more surface area for diffusion, storage area, hydrostatic skeleton, way of getting waste and reproductive products out of body, allows for increase in body size

Nematoda

Unsegmented, cylindrical "roundworms"

Cuticles

Non-living and must be shed or "molted"

Complete digestive tract

Waste out the other

Complete digestive tract

Allows for sequential breakdown and absorption of food and specialization of region and conditions now possible

Dissecting Kit

Used for dissecting specimens.

Lobed

The mouth is this in Ascaris.

Lateral lines

Like "racing stripes", they are translucent lines.

Uterus

Largest tubes in female Ascaris

Ovary

Smallest tube in female Ascaris.

Intestine

Flat

Parasite strategy

High volume reproduction

Cross Section

Ascaris