Answers: 1.Circulatory system-pumping blood to and from the body and lungs with the heart 2.Digestive system-digestion and processing food with salivary glands, esophagus, stomach, liver, gallbladder, pancreas, intestines, rectum, and anus.
During the tie, the male turns around so the dogs are back to back and can defend themselves. The tie typically lasts 20 to 40 minutes. It may be just a few minutes, and dogs can mate successfully without becoming tied at all. The evolutionary reason for the tie is unknown, but it's assumed that if a male dog is tied to a female, it prevents other males mating with her. Unwanted Mating.
The rule is that a puppy can only hold his potty for the same number of hours as his age in months. So a 3 month old puppy can hold it for 3 hours, a 4 month old for 4 hours, etc. At about 6 to 8 months your dog should be able to hold his potty for an entire night. During the day it is different though, and each dog is different. You need to be aware of your puppyâs potty habits.