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.
Most responsible breeders do not allow their puppies to leave to their new homes until the pups are 11 - 12 weeks old. Backyard puppy producers and puppy mills and commercial producers will start getting rid of the pups at 6 weeks but this is not a good time for the puppy to leave for a new home.eport Abuse. 8 weeks is usually when puppies can leave their mom; however, puppies of smaller breeds (Cavaliers, Chihuahuas, Yorkies, etc.) are better off staying longer. One of the biggest reasons that it's best for puppies to stay with the litter for longer is for socialization.