Necturus section 4 and 6 Flashcards
how are mudpuppy teeth like fish teeth
small, conical, and homodont
what are the teeth sets on the upper jaw
premaxillary V, and vomerine with pterygoid set
what are the teeth sets on the lower jaw
dentary teeth with small sets of splenial teeth at the ends
the tongue is supported by what arch
hyoid arch supports the tongue
what is the function of gill rakers
short projections on either side of the gills that prevent large particles from passing over the gills
where does the glottis open into
pharynx to glottis to larynx
what does the glottis cover
esophageal opening
where does the esophagus extend from
esophageal opening in pharynx to the stomach
why is the epithelium lining the inside of the esophagus cilliated
for peristalsis
where is the stomach terminated
at the pylorus
where is the duodenum located
anterior part of the small intestine
what does the duodenum receive
openings of bile and pancreas ducts
what does the ileum resemble
loosely coiled tube
where does the ileum extend from
duodenum to rectum
where does the rectum end
ends with the cloaca
what is another name for the rectum
large intestine
what is the function of the liver
detoxifies, secretes some chemicals
what is the gall bladder
beginning of the bile duct
where is the pancreas located
along the length of the duodenum (whitish organ)
what organ of the digestive gland has no digestive function
spleen
what are the digestive glands
liver, gall bladder, pancreas, spleen
what are the digestive organs
esophagus, stomach, duodenum, ileum
what is another name for body cavity
coelom
what does the transverse septum divide the body into
pericardial cavity and pleuroperitoneal cavity
what does the pericardial cavity contain
heart
what does the pleuroperitoneal cavity contain
everything except the heart
what is the gastrospelnic ligament
between stomach and spleen
what is the faciliform ligament
liver and ventral body wall
what is the hepatogastric ligament
stomach and liver
what is the hepatoduodenal ligament
liver and duodenum
a male deposits a ____ that is then picked up by the female
spermatophore
what is a spermatophore
clusters of sperm enveloped by a gelatinous substance
what are the two theories on how the female picks up the spermatophore
direct physical contact, spermatophore in river and female uses muscular movement of cloaca (no copulation or amplexus)
what is the spermatheca
in the cloaca, serves as a receptacle for spermatozoa
when do neturus eggs happen
female receives sperm in fall, eggs laid in the following spring
where are the eggs kept once laid
in a hollowed out space in sand under log or rock
up to how many individual eggs can be deposited
150
why does the female remain in the nest
to guard the eggs with brooding behavior
why does adult necturus remain in nest after eggs hatched
why leave a shelter thats already established
how long does it take for eggs to hatch
6-9 weeks
how long does it take baby to mature to adult
up to 8 years
whats the life span of mud puppy
25 years
where are the testes located
on each side of the mid dorsal line above the kidneys
what is the mesorchium
(male) messentry that attaches testes to the dorsal surface
where are the efferent ductules located
along the mesorchium from the testes to the kidneys containing sperm
what is the function of the slender parts of the kidneys in males
genital in function (tubules in this region modified for sperm passage)
what are the mesonephric ducts in males
on lateral border of kidneys, convey sperm and urine
what is the cloaca in males
terminal sinus of digestive, reproductive, and excretory systems, with papillae
why is the bladder so important in males during breeding season
has small glands that open into the cloaca to hep remove the spermatophore
where are the ovaries located on the female
cover anterior of the kidneys with masses of ova
what is the female mesovarium
messentries that suspend ovaries from mid dorsal wall
what are the oviducts
large coiled ducts lateral to each kidney and ovary, expands to form uterus
what is the ostium
funnel shaped opening of the oviduct
where do the uteri open to
open into the sides of the cloaca
what are the mesotubarium
mesentry that attaches each oviduct to mid-dorsal body wall
what does female cloaca lack that male cloaca has
papillae
