Inferior vena cava. The inferior vena cava (or IVC) (Latin: vena, vein, cavus, hollow) is a large vein that carries deoxygenated blood from the lower and middle body into the right atrium of the heart. Its walls are rigid and has valves so the blood does not flow down via gravity.
Tight Junctions The tight junction (also referred to as a zonula occludens) is a site where the membranes of two cells come very close together. In fact, the outer leaflets of the membranes of the contacting cells appear to be fused. Tight junctions, as their name implies, act as a barrier so that materials cannot pass between two interacting cells.
Tight junctions hold cells together in a sheet, restricting the movement of substances between the cells. Tight junctions are found in cells that line the digestive tract. 2--Adherens junction. Adherens junctions are anchoring junctions that use integrin to hold cells together by anchoring to the cells' actin networks.Adherens junctions, as other anchoring junctions are found in tissues that are subject to mechanical stress such as muscle and epithelium.esmosomes are anchoring junctions that use cadherin to hold cells together by anchoring to the cells' actin networks, or for more stable cell-to-cell connections by anchoring to the cells' intermediate fibers.