Transcript Rat Dissection

Rat Dissection
Rat Classification
• The Rat, Rattus norvegicus albinus, belongs to
the Kingdom Animalia, phylum Chordata, Class
mammaila, Order Rodentia, genus Rattus, and
species norvegicus.
Orientation
External Anatomy
Sex?
• On female rats, just posterior to
the last pair of teats, you will
find the urinary aperture and
behind that the vaginal orifice
which is in a small depression
called the vulva.
•
On males, you will find a large
pair of scrotal sacs which
contain testes. Just anterior to
the scrotal sacs is the prepuce,
which is a bulge of skin
surrounding the penis. The end
of the penis has a urogenital
orifice, where both urine and
sperm exit.
Can you tell which one is the male?
Muscles
Body Cavities
Thoracic Cavity
What organs are found in this
cavity?
What muscle would be indicated
by the red line?
Abdominal Cavity
What organs are found in this
cavity?
Thoracic Cavity
What are the names and functions of all the structures indicated by
red arrows?
1
2
3
5
6
7
4
Circulatory System in the Thoracic Cavity
Thoracic Cavity
What gland covers the
heart and what is it’s
function?
What is this tube and
what is it’s function?
How many lobes
total… How many on
the right and on the
left?
Throat/Neck Region
What are the structures
indicated by the red
arrows and what are
their functions?... Hint…
Number three is a gland
that controls metabolism
and is under control by
the anterior pituitary.
1
2
3
4
Abdominal Cavity
•What organ is this?
• How many lobes
does it have?
•What digestive
functions does it
have?
•How does it help
control blood
glucose levels?
•How does it
function in the
excretory system?
•What does it do
for the blood?
Abdominal Cavity
•What organ is
indicated by pin #1?
• How does it
control blood
glucose levels?
•What digestive
functions does it
have?
•What organ is
indicated by pin #3?
•What is it’s
function?
•Pin #4 is in the
duodenum… Why is
this an important
location?
Abdominal Cavity
Can you name
the structures?
Male and Female
Urogenital/Reproductive Systems
Which is male and which is female?
Male or Female?
What are the structures labeled with red
arrows? What are their functions?
1
6
2
5
3
4
Male or Female?
How is the uterus of the rat different from a humans?
What structures are indicated by 3 through 7?