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.
Also, the dog is 16 weeks old so he should be able to hold it a couple of hours. Maybe increase your time in between taking him out so he doesn't think you can potty every 30 minutes. He needs to learn to hold it. Start with an hour and a half for a few days then go to 2 hours, etc.lso, the dog is 16 weeks old so he should be able to hold it a couple of hours. Maybe increase your time in between taking him out so he doesn't think you can potty every 30 minutes. He needs to learn to hold it. Start with an hour and a half for a few days then go to 2 hours, etc.