View the following related links for a couple example of a cow's digestive system.
Digestive system which processes food for use in your body.
brainpop.com
There are many places where one can find the terminology on the process of the human digestive system. One can find this information on the human digestive system Wikipedia page. One may also find this information through many different medical related websites.
You can find such pictures on the Internet, by doing a search on your favorite search engine for such words as "cow birthing" or "calving" or "cow[s] giving birth." Click on images and you should find the kind of pictures you are looking for. Also, the cattle forum at Cattle-Today.com have several threads where members have posted pictures of cows giving birth. Such a thread can found in the related link section below.
Wolverines have a digestive system that is similar to other carnivores. The stomach is not divided into chambers like you would find in ruminants.
Look in the worm's digestive system!
A person can find accurate pictures of the urinary system in biology books at universities as well as anatomy textbooks. If one has internet access there are websites which provide accurate pictures as well.
If you want the drawing of the digestive system of a human being, you are likely to find one in a biology, health or nutrition book. This type of book can be obtained from the library or bookstore. Alternatively, you can find a drawing of the human digestive system via the Teach PE website.
encyclopedia
One can find pictures of books that are available for loan on their local library's computer system. One can also find pictures of books that are for sale on sites such as Amazon, Overstock and eBay.
You can find pictures of cows and the names of the parts in any library or school library. You can also check out local bookstores.
On-line or in a textbook on Sheep anatomy at your local library