Inductive definition of CW complexes. If the largest dimension of any of the cells is n, then the CW complex is said to have dimension n. If there is no bound to the cell dimensions then it is said to be infinite-dimensional. The n-skeleton of a CW complex is the union of the cells whose dimension is at most n.
Deoxygenated blood enters the right atrium through three major veins: the superior and inferior vena cava and the coronary sinus. The superior vena cava returns all of the blood to the heart from tissues superior to the heart in the head, neck, arms and upper thorax.
Blood Flow Explanation. All blood goes into the right side of your heart through two main veins: The superior vena cava (SVC) and the inferior vena cava (IVC). The SVC gets blood from the upper part of the body. The IVC gets blood from the lower part of the body. Blood leaves the SVC and the IVC and enters the right atrium (RA).