Transcript text: Tissue fluid becomes lymph once it has entered a lymphatic capillary; lymph formation depends on tissue fluid formation. Tissue fluid is made up of Blank $\mathbf{1}$ and dissolved substances that leave blood capillaries by the process of Blank $\mathbf{2}$.
The Blank 3 pressure of tissue fluid drive the entry of lymph into lymphatic capillaries. A condition that interferes with the flow of lymph will result in a condition called Blank 4.
Lymph nodes are Blank 5 shaped with blood vessels, nerves, and efferent lymphatic vessels attached to the indentation, called the Blank 6, and with afferent lymphatic vessels entering on the convex surface.
The white blood cells within lymph nodes filter Blank 7, and remove bacteria and cellular debris before it is returned to the blood. Lymph nodes are also centers of Blank 8 production; these cells function in immune surveillance.