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Frog Frog Dissection LabDissection Lab
External Nares
Skin Tympanum
Vomerine Teeth
Maxillary Teeth
Eustachian Tubes
Internal Nares
Glottis
Esophagus
Tongue
Heart
Lungs
Liver
Stomach
Small Intestine
Gall Bladder
Large Intestine
Spleen
Kidney
Oviducts/Eggs
Testis
Skin It’s covered with a protective slime secreted
by glands within the skin. Oxygen passes through tiny blood vessels in the frog’s skin, helping it breathe. These colored patches on the skin are called chromatophores, which act as camouflage, helping the frog blend
into its surroundings in the wild.
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Tympanum
The tympanum, found just behind the eyes, functions as the ears of
the frog. They receive sound waves both above and below
water allowing the frog to hear.
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External Nares
The nares primary role is to let air into and out of the frog. This
is a view of the nares from outside of the frog.
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Internal Nares The nares primary role is to let air into and out of
the frog. This is a view of the nares from inside of
the frog.
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Maxillary Teeth
This set of teeth is used for holding
prey.
Home Vomerine Teeth
This set of teeth is also
used for holding prey.
Home Eustachian Tubes
The eustachian
tubes function to equalize pressure on both sides of
the eardrum or tympanum
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Tongue
The tongue aids in
swallowing and catching prey. In humans the
tongue also aids in speech
and taste.
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Glottis
The glottis is the opening between the vocal chords at the
upper part of the windpipe or larynx.
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Esophagus
Food is swallowed through the
esophagus where peristalsis aids its movement to the
stomach.
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Lungs
The lungs transport oxygen to the blood as well as remove
waste like carbon dioxide through a
process called respiration.
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Heart
Unlike the human heart the heart of a frog only
has three chambers (two atria and one
ventricle) however the role and function is the same. The heart pumps blood throughout the body carrying oxygen
and nutrients and picking up waste to be
filtered by other parts of the body.
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Large Intestine
The main role of the large
intestine is to absorb water
and store fecal material until it
can be excreted from
the body.
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Small Intestine
The small intestine receives
the mixture of chyme from the stomach through the pyloric valve.
In the small intestine nutrients are absorbed from the tiny villi lining the inner walls of
the small intestine.
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Stomach
In the stomach food is further
broken down by gastric juices and peristalsis until it becomes a liquid substance called
chyme.
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LiverThe liver
produces bile, a substance that emulsifies fats
contained within the food
we eat, and stores it in the gall bladder to
be secreted into the small intestine.
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Gall BladderThe gall bladder stores bile that is
received from the liver. Bile is secreted from
the gall bladder into the first
section of the small intestine (duodenum) to
help aid in digestion.
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Spleen
The spleen helps to destroy old red
blood cells and lymphocytes,
which are cells that produce
antibodies to help fight infected and cancerous cells.
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Kidneys
The Kidneys filter out waste from the blood through structures
known as nephrons. The waste removed is combined with water to
form urine.
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Oviducts & Eggs
The oviducts are tubes that
carry eggs from the ovaries to
the uterus. The eggs are the
female reproductive
cell.
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Testis
The testis are the male
reproductive gland that produce
sperm and male
hormones such as
testosterone.
External Nares
Tympanum
Vomerine Teeth
Maxillary Teeth
Eustachian Tubes
Internal Nares
Glottis
Esophagus
Tongue
Heart
Lungs
Liver
Stomach
Small Intestine
Gall Bladder
Large Intestine
Spleen
Kidney
Oviducts/Eggs
Testis