Mink DissectionHandout TeacherWeb by MikeJenny

VIEWS: 199 PAGES: 13

									Name: ________________________________Date: _____________ Per._______


                      Mink Dissection Observation Sheet


  1
                                  Physical Characteristics of Mink
         Class:


         Order:




  2
         List the observable external features that support the mink’s placement in its
         particular class and order.




  3
                                             Sensory Organs
         Describe how the sensory structures of the head provide the mink with the ability
         to respond to environmental stimuli

         a. Pinnae:


         b. Nares:


         c.   Eyes:

         d. Vibrissae



  4
                                          Tapetum lucidum
         What advantage does the tapetum lucidum provide the mink?




  5
                                          Anal Gland Secretions
         What uses do you think anal glad secretions provide to the mink?




 6
                                        Gender( Male or Female)

         What gender is your specimen?   □  Male   □   Female


 7
                             Thoracic and abdominal cavity organ systems
         What major organs are present in the thoracic cavity?
         What major organs are present in the abdominal cavity?


Thoracic Cavity




Abdominal Cavity
    Name: ________________________________Date: _____________ Per._______


    Thoracic Cavity and Neck Region
    Directions: After reading the procedure, fill in the blanks with the necessary
    terms.

    The ____________ ___________ is a mass of dark brown tissue embedded in
    the fat cranial to heart. The ___________ lies in the ___________ cavity,
    surrounded by the tough _______________. The lungs lie in the
    _____________ ____________, the other subdivisions of the thoracic cavity.
    The right lung has three major lobes, the _________, _____________, and
    _________________, and a fourth smaller intermediate lobe, more dorsal in
    position and associated with the postcava. The left lung has two lobes, the
    ______________ and ________________. Follow the trachea and esophagus
    as they enter the thorax. Dorsal to the heart, the trachea divides into left and right
    _____________, which carry air to and from the __________. The esophagus
    continues dorsal to the heart and penetrates the muscular _____________ to
    enter the abdominal cavity.




                                                            5

                                                             6
                                                                7
1
                                                                    8
2
                                                                    9
3

4

    Analysis Question: (On back paper)
    1. Describe the action of the diaphragm in the mechanical process of
    breathing.
Name: ________________________________Date: _____________ Per._______


       Abdominal Cavity- The Digestive System

   Organ Structure                         Function
1. Teeth

2. Salivary Glands

3. Esophagus

4. Stomach

5. Duodenum

6. Liver

7. Gallbladder

8. Pancreas

9. Jejunum

10. Ileum

11. Cecum

12. Colon

13. Spleen

14. Greater Omentum

15. Rectum
Name: ________________________________Date: _____________ Per._______


Directions: After reading the procedure, fill in the blanks with the necessary
terms.

After exposing the liver the mesentery between the liver and the ______________
is the _______________ _____________. It divides the liver into right and left
sides. The lobe of the right side of the liver closest to the ________________ (the
right median lobe) contains the dark green __________ _______________.
The _________________ is attached to the liver and part of the _______________
___________________ by a mesentery called the _______________
__________________. Attached to the greater curvature of the stomach is the
_______________ _______________, an extensive sheet of mesentery laden
with __________. It extends caudally and covers most of the remaining abdominal
viscera.
The gastric rugae found inside the _____________, are large longitudinal ridges.
The size of the stomach in the mink, as in other carnivores, depends on how
recently and how well the organism ate. If the stomach in your animal is full of
food, it may be enormous. The stomach is closed by contraction of the
______________ ____________. When the sphincter ____________, food is
permitted to pass into the small intestine. The ____________ is a greenish-brown
organ lying in a mesentery on the left side of the stomach. The _____________
_______________, begins at the pyloric sphincter. In the _______________ of
the first part of the small intestine lies the right limb of the _________. It is
pinkish (brown in some minks) and rather __________ in structure. The
left limb lies near the ____________ and extends to the __________. The products
of the pancreas (digestive enzymes) and of the liver (bile) are carried into the small
intestine by a _____________ __________ ____________. The large cystic duct
from the __________ _____________ and several _____________
__________ from the liver join to form the common bile duct. Bile passes from
the liver to the gall bladder, where it is stored and concentrated. Eventually it is
_____________ into the small intestine. The common bile duct enters the small
intestine near the _____________, and its point of entry may be marked internally
by a ________________ _______________. The two pancreatic ducts, one from
each limb, join the common bile duct just before it enters the ______________
______________.
Occasionally one of the pancreatic ducts will have a separate entry to the
______________.
The small intestine is divided into three segments: the _____________, which
begins at the pyloric sphincter, the _______________, and the ___________.
The _____________ is attached to the stomach. The ileum opens into the large
intestine, or ____________. There is no cecum, or pouch, developed at this point
in the gut of the mink. The colon is not ________________ into ascending,
transverse, and descending segments as in many other mammals. It is instead a
short descending tube that ends in the ________________. The mink has a pair
of ______________ ____________ associated with the rectum. They produce evil-
smelling musk and are usually _____________ during commercial preparation of
dissection specimens. If they have not been removed, don't ______________ them
open.
   Name: ________________________________Date: _____________ Per._______



   Analysis Questions:
1. Draw and label the digestive of the mink from mouth to anus. Describe step-by-
   step the process of digestion.
Name: ________________________________Date: _____________ Per._______


PART 3: MINK DISSECTION – HEART

Directions: After reading the procedure, fill in the blanks with the
necessary terms.

The circulatory system of the mink consists of __________ _________
and the _____________ __________ __________ (heart, arteries,
veins, portal veins, and capillaries). The arteries and veins of your specimen
should be injected with colored latex -- red for systemic ___________ and
blue for systemic ___________. The hepatic portal system, if injected,
should be yellow. If it is not injected, the vessels can be traced because the
dark _______________coagulated blood is visible through the thin walls.
The best way to trace blood vessels is to use forceps and a
______________ ______________.

_______________ carry blood _____________ from the heart to capillaries
in either the lungs or the rest of the body. Arterial blood is under high
____________, and the walls of arteries are __________. _____________
carry blood from capillaries back to the heart. Venous blood is under
__________ pressure, and the walls of veins are ____________.
_______________ veins carry blood from one capillary bed to another
without passing through the heart.

The _____________________ extends onto the great vessels connected to
the heart and is reflected back on them and on the heart surface as the
______________, or ______________ ___________.

The _____________ lie towards the right side of the chest. The
___________ are drawn to apoint, the __________, on the ________
side. The atria are separated externally from the ventricles by the deep
_______________ ________________. Right and left ventricles are
separated externally by a shallow ________________ ___________ in
the musculature.

The heart musculature has its own blood supply, the ______________
______________. These arteries come off the systemic ___________ and
run in the coronary ____________. Branches run from the sulcus to the
atria and down the ventricles to the ____________, supplying the muscular
heart wall. The heart muscle capillaries are drained by a number of
_____________ ___________. Those draining the ventricular wall run
from the apex toward the atria and empty into the _______________
___________ on the dorsal surface of the heart. The coronary sinus
empties into the right atrium.
Name: ________________________________Date: _____________ Per._______


Directions: Use the Mink Dissection Manual to help fill in the missing
structures on the heart.

Heart, Ventral View

           1
                                                  4

                                                      5

                                                          6
               2



                                                          7

           3
                                                              8




1.   ________________________
2.   ________________________
3.   ________________________
4.   ________________________
5.   ________________________
6.   ________________________
7.   ________________________
8.   ________________________
Name: ________________________________Date: _____________ Per._______


Directions: Use the Mink Dissection Manual to help fill in the missing
structures on the heart.

Heart, Dorsal View

                            1                              2

                   3


               4
                                                       5



           6                                          7



       8
                                                       9

                       10




  1. ________________________
  2. ________________________
  3. ________________________
  4. ________________________
  5. ________________________
  6. ________________________
  7. ________________________
  8. ________________________
  9. ________________________
  10. ________________________
Name: ________________________________Date: _____________ Per._______


  Analysis Questions:
  Describe the flow of blood through the heart. Be sure to
  mention when the blood is oxygenated and deoxygenated and
  include all chambers, pathways, and valves.
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
  __________________________________________________
Name: ________________________________Date: _____________ Per._______


PART 4: MINK DISSECTION – URINARY SYSTEM
The kidneys lie against the ____________ body wall and are covered by
_______________ ____________. The ___________ ___________ are small
dark brown bodies lying in the _________ medial to each kidney. The __________
adrenal gland lies __________ to the right renal vein. The ____________ is
connected to the ventral body wall by a suspensory ligament. ____________
passes from the kidneys to the bladder via the ____________ and is stored there.
The urine eventually passes from the ___________ to the outside of the body
through the _______________.

The kidney of the mink is ____________-shaped, having a convex lateral border
and an indentation, the _________, medially. The ___________, renal artery,
and __________ _________ enter the kidney at the ___________. Internally, two
zones of tissue can be distinguished macroscopically -- the outer granular
___________, and the inner striated ____________. The ___________ and
capsules of the kidney tubules are in the cortex, and the __________ _____
____________ and the collecting tubules are in the _________. In the mink all
collecting tubules converge at a single ____________, where the urine is emptied
into a cavity, the _____________ ____________. The renal pelvis is drained by
the _____________.


Kidney, frontal section




          1                                                      4



          2
                                                                     5


                                                             6
         3



   1. ________________                     4. ________________
   2. ________________                     5. ________________
   3. ________________                     6. ________________
Name: ________________________________Date: _____________ Per._______


Analysis Questions:
Describe the internal structure of the kidney.
____________________________________________________
____________________________________________________
____________________________________________________
____________________________________________________
____________________________________________________
____________________________________________________
____________________________________________________
____________________________________________________
____________________________________________________
____________________________________________________
____________________________________________________
Name: ________________________________Date: _____________ Per._______


PART 5: MINK DISSECTION – REPRODUCTIVE SYSTEMS

Female Reproductive Tract
The uterus of the mink is _______________, having two ___________ which
meet dorsal to the urinary bladder to form the _________ of the
_____________. Each horn is supported by a sheet of mesentery called the
_____________ ________________.

In the intact animal they are enclosed in a skin pouch, the ____________, which
is removed with the pelt. The tough sheath of the testicle is the _____________
_____________, an extension of the parietal ____________ of the body cavity.
Sperm are produced in the ___________, are stored in the ____________, and
eventually pass into the ____________ _________.

FEMALE URINARY & REPRODUCTIVE TRACTS


                                                        1. ________________________
1                                                       2. ________________________

                                                        3. ________________________

                                                        4. ________________________
    2                                               3
                                                        5. ________________________

                                                        6. ________________________
                                                5
                                                        7. ________________________
          4




                                      7
                 6
Name: ________________________________Date: _____________ Per._______


MALE URINARY & REPRODUCTIVE TRACTS


                                                         1


                                                     2




                      3


                      4
                                                             5




                  6



                                                         8

              7




Analyis Questions:
Why does size and morphology of the female reproductive structures vary in
minks?
____________________________________________________
____________________________________________________
____________________________________________________
____________________________________________________
____________________________________________________
____________________________________________________

								
To top