Lymph capillaries are not present in epithelium (eg, epidermis), cartilage or other tissues devoid of blood vessels; neither are they present in parts possessing sinusoids, nor in the brain or eyeball—though in the brain the perivascular spaces, continuous with the subarachnoid space, substitute for them. Lymph capillaries do not accompany the blood capillaries between the alveoli of the lungs, nor in the glomeruli of the kidneys, since these capillaries are not nutritive in function—but in the lungs lymph vessels do accompany the bronchial vessels.
July 2003. Arch Surg. 2003;138(7):715. doi:10.1001/archsurg.138.7.715