Search results
Results from the WOW.Com Content Network
A few marine annelids that live in tubes lack cuticles, but their tubes have a similar structure, and mucus-secreting glands in the epidermis protect their skins. [8] Under the epidermis is the dermis , which is made of connective tissue , in other words a combination of cells and non-cellular materials such as collagen.
Promoted File:Annelid redone w white background.svg--Armbrust The Homunculus 06:44, 13 June 2014 (UTC) There is a rough consensus that the white (transparent) background is better. I also placed it in Wikipedia:Featured pictures/Sciences/Biology, as the diagram doesn't show a whole animal. Armbrust The Homunculus 06:44, 13 June 2014 (UTC)
The peritoneum is the serous membrane forming the lining of the abdominal cavity or coelom in amniotes and some invertebrates, such as annelids.It covers most of the intra-abdominal (or coelomic) organs, and is composed of a layer of mesothelium supported by a thin layer of connective tissue.
Microscope image of an individual elytron from Augenerilepidonotus dictyolepis.Note the fringing papillae on the border. In annelids, elytra (/-t r ə /; from Greek ἔλυτρον "sheath, cover"; sg.: elytron / ˈ ɛ l ə t r ɒ n /) [1] are shield-like scales that are attached dorsally, one pair on each of a number of alternating segments and entirely or partly cover the dorsum. [2]
By the 1950s, cell biologists verified the existence of plasma membranes through the use of electron microscopy (which accounted for higher resolutions). J. David Robertson used this method to propose the unit membrane model. [4] Basically, he suggested that all cellular membranes share a similar underlying structure, the unit membrane. Using ...
An image plate showing the different anatomical features (dashed outline) of a representative annelid parapodium. Parapodium is from Lepidonotus oculatus and is a Museums Victoria specimen. Microscope photograph of a parapodium from a specimen of Arctonoe sp. showing the internal acicula that support the two lobes of the parapodium. This ...
A diagram of the inner organs of an annelid worm showing the metanephridia and both nephrostomes in one of the animal's segments. The nephrostome [1] is the funnel-like component of a metanephridium. It is always oriented towards the coelom.
Like other annelids, these worms possess well-developed nervous systems. The nervous system consists of a central brain in the upper part of the head, which is relatively large compared with that of other annelids. Extending from the brain is a large ventral nerve cord running the length of the body.