C Elegans Anatomy
The alae is formed by the hypodermal seam cells where a fibrous ribbon of a zona pellucida zp domain protein is produced. The outer tube is covered by the collagenous extracellular cuticle which is secreted by the underlying hypodermis kramer this volume.
The Nematode Caenorhabditis Elegans The Cold Spring Harbor
Elegans anatomy has been reviewed by white 1988.
C elegans anatomy. Elegans many of these proteins are termed cut 1. Hermaphrodites with 959 somatic cells and males with 1031 somatic cells. The head contains the brain and the prominent feeding organ the pharynx.
Elegans includes a mouth pharynx intestine gonad and collagenous cuticle. Elegans hermaphrodite has 302 neurons that belong to two distinct and independent nervous systems. A database of behavioral and structural anatomy of caenorhabditis elegans.
Like all nematodes they have neither a circulatory nor a respiratory system. Hermaphrodites are essentially females that produce and store sperm at one stage in their life cycle before beginning to produce oocytes making them self fertile animals. Elegans has a simple anatomy with a small number of tissues and internal organs see figures 2 and 3.
In the body a continuous row of in the body a continuous row of neuron cell bodies lies at the midline adjacent to ventral hypodermis. The cut refers to cuticulins which are the various proteins that are not solubilised by both reducing agents and detergents made insoluble by the nature of their crosslinks. Elegans exist as two sexes with interesting anatomical features.
Elegans neurons are located in the head around the pharynx. The basic anatomy of c. Elegans feeds through a two lobed pharynx which is nearly an autonomous organ with its own neuronal system muscles and epithelium.
The entire cell lineage of the c. Elegans embryo has been tracked from fertilization through hatching by sulston et al 1983 and generates 671 cells 113 of which undergo cell death in the hermaphrodite 111 in the male. Like all nematodes they have neither a circulatory nor a respiratory system.
The lumen of the pharynx is continuous with the lumen of the intestine and the pharynx passes ground food into the intestine via the intestinal pharyngeal valve. The main body is filled with the intestine and in the case of an adult hermaphrodite the gonad consisting of the uterus and spermatheka. Wormatlas tissues are labeled with a color code.
What is their life like in nature. At each of the four larval molts a new cuticle of stage specific composition is secreted and the old cuticle is shed. A large somatic nervous system 282 neurons and a small pharyngeal nervous system 20 neurons.
The pharynx is separated from the outer tube of tissues and pseudocoelom by its own basal lamina introfig 2b d. There are two sexes of c.
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