Best Answer: The definitions will tell you the differences. The nucleus, in a eukaryotic cell, contains the DNA for cell function and, therefore, is the control center of the cell (It is NOT a brain).It also contains the nucleolus which is the site where ribosomes are manufactured.he nucleus, in a eukaryotic cell, contains the DNA for cell function and, therefore, is the control center of the cell (It is NOT a brain). It also contains the nucleolus which is the site where ribosomes are manufactured.
The heart contains four chambers. The two upper chambers are the atria and the two lower chambers are the ventricles. On the cranial surface of each atrium is a pouch-like appendage called an auricle which is thought to increase the capacity of the atrium slightly.
The heart consist of 4 chambers-2 atria and 2 ventricle. The atria is about 1/3 the size of the ventricle. The left ventricle is the largest chamber of the heart. The left ventricle has about three time the mucsle than the right ventricle. The chambers of the heart provide a multiple step pathway for blood to be first sent to the lungs for respiration and then dispensed to the body's cells to keep us alive. Read to learn about the 4 chambers of the heart.