The medulla oblongata is part of the nervous system in the lower  half of the brainstem in which connects the brain and spinal cord.  It is subconscious and it controls the â¦ involuntary action such as  breathing, blood pressure and even heartbeat. Answered.he lower portion of the brainstem (brainstem includes the middle brain, pons, and medulla oblongata), which controls visceral functions of the body, such as heart rate, breathing/respiration, and blood pressure.
Once the breeding is done, there s nothing to do but wait. Pregnancy lasts 61-64 days; puppies can be detected by x-ray or ultrasound about halfway through. There are some telltale signs increased appetite, weight gain, nipple enlargement but they could apply to a false pregnancy as well as the real thing.
It is healthy for dogs to have puppies (1-2 litters), however it can be difficult for dogs over the age of 6 to have puppies. The oldest age for a dog to have puppies should be 6 depending on the health and fitness of your dog. As dogs get older it can become extremely difficult for them to have puppies, especially medium sized and smaller dogs. It is better if you have your dog fixed by 7 years old.