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.
They CAN be impregnated as young as their first heat cycle, however this is very dangerous for them and unhealthy as they are still a puppy themselves. They SHOULDN'T be bred until after 2 years of age, proper health testing, and being proven in their breed.hysically, yes, a dog can have pups as young as 6 months. But it's not good for them. (It isn't even exactly good for them at the right age.) That said, the earliest age ever should be two years. Mostly because some of the health testing cannot be done until this age.