Aorta (Definition) The aorta is the largest artery in the body, leaving directly from the left ventricle of the heart to supply blood to the entire body. It is made of elastic tissue layers called intima and is subject to damage by high blood pressure, smoking, cholesterol, and inherited risk factors. ...Read more.
Puppies need five minutes of exercise per month of age up to twice a day, according to the U.K. Kennel Club. In other words, a 3-month-old puppy will need 15 minutes of exercise while a 4-month-old will need 20 minutes. This may take the form of low-impact activities like swimming or playing with small dog exercise balls. You can also take your puppy out for short walks on a leash.
You cannot train even an adult dog for 8 hours a day. About the most that can be done at any one time is 10 - 20 minutes and that is with an adult dog and not a puppy. The attention span on this baby is extremely short and training session should be no more than 10 minutes and twice a day.