-
modification of the
articulated operculum in
which the
spiral is not so
evident as in
Navicella Example of a
concentric operculum (Filopaludina martensi) Example...
- The
operculum is a
series of
bones found in bony fish and
chimaeras that
serves as a
facial support structure and a
protective covering for the gills;...
- When an
opposing tooth bites into the
operculum, it can
initiate or
exacerbate pericoronitis resulting in a
spiraling cycle of
inflammation and trauma. Over-eruption...
- A
spiral valve or
scroll valve is the cork****-shaped
lower portion of the
intestine of some sharks,
Acipenseriformes (sturgeon and paddlefish), rays...
- main
conical s**** (previously
referred to as a ‘conch’) and a cap-like
operculum. Some also had two
curved supports known as
helens They are calcareous...
-
nucleus measures one-third the
distance across the face. The
operculum itself bears a deep,
spiral groove and is also
granular on the
convex outer surface...
- contrast, bony
fishes have a
single outer bony gill
covering called an
operculum. Most
sharks and rays have five
pairs of gill slits, but a few species...
- that have oil glands. The
sepals and
petals are
fused to form a "cap" or
operculum over the stamens,
hence the name from Gr**** eû ("well") and kaluptós ("covered")...
-
refer to the two
chromatically hued
spiral structures, the most
common feature seen by divers. The
multicolored spirals are
highly derived structures for...
-
cannot be
retracted within it (semi-slug). Some
snails also
possess an
operculum that
seals the
opening of the s****,
known as the aperture,
which provides...
