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[pic]Activity 4.2.1 – External Anatomy
Purpose
While you were taking care of a friend’s horse, you noticed that the animal came up limping. The local veterinarian is called to the scene and tells you it is only a cut on the hock of an animal, and you need to keep the cut clean and give the horse a shot of antibiotics in the croup. Great news, but do you have any idea as to where the hock and the croup are?
Knowing the proper terminology for external animal anatomy is important for communication. Most parts on animals have similar names among species; however, there are names of some parts that are specific for a species of animal. Being able to identify and communicate using proper terminology is important for health care, management, and selection.
Materials
|Per student: |
|Modern Livestock and Poultry Production textbook |
|Computer station with Internet access |
|Pencil |
|Agriscience Notebook |
Procedure
Review the diagrams from the textbook related to external animal parts. Complete the tables in Part One and Part Two identifying common parts among animal species and distinguishing parts that are species specific, such as the comb of a chicken.
Review the following pages from Modern Livestock and Poultry Production textbook to help you complete the tables: • Beef Cattle Anatomy – Page 269 • Swine Anatomy – Page 401 • Sheep Anatomy – Page 508 • Horse Anatomy – Page 590 • Chicken Anatomy – Page 668 • Dairy Cattle Anatomy – Page 746
Part One – Common Parts Shared Among Animal Species
In Table 1, a list of external parts that are commonly found among most animal species is provided. For each external part, identify the part on the diagram of the animal species found on the textbook pages listed above. Provide a brief description of where the part is located on the animal and what purpose it serves the animal. To determine the purpose of the external part, you will need to research the part using the Internet or classroom animal reference textbooks.
|Table 1 Common Parts Found on Animals |
|External Part |Location |Purpose |
|Dew Claw | | |
|Fetlock | | |
|Flank | | |
|Hock | | |
|Hoof | | |
|Loin | | |
|Muzzle | | |
|Pastern | | |
|Poll | | |
|Sheath | | |
|Tail | | |
Part Two – Species-Specific Animal Parts
Complete Table 2 by comparing animal diagrams found in the textbook and determine two parts that are unique to each species of animal listed in Table 2. Provide information about the location of the part and the purpose it serves the animal.
|Table 2 Species Specific Parts |
|Species |Unique Part |Location |Purpose |
|Beef/Sheep | | | |
| | | | |
|Chicken | | | |
| | | | |
|Dairy Cow | | | |
| | | | |
|Horse | | | |
| | | | |
|Swine | | | |
| | | | |
Conclusion
1. Explain how the hock and the knee of quadruped animals are similar.
2. Explain how knowledge of external anatomy is helpful for animal production.
3. In some dairy cattle operations, the the tail of a cow is partially removed to prevent contamination of milk during the milking process. What is the purpose of the tail and how may removing the tail of a cow be detrimental?
4. List five external parts found on animals that are also found on humans.
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