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A plug of some substance lodged in a blood vessel, being brought thither by the blood current. It consists most frequently of a clot of fibrin, a detached shred of a morbid growth, a globule of fat, or a microscopic organism.

The thin epithelium lining the blood vessels, lymphatics, and serous cavities. See Epithelium.

of cells lining the alimentary canal and all its appendages, all glands and their ducts, blood vessels and lymphatics, serous cavities, etc. It often includes the epidermis (i. e., keratin-producing epithelial cells), and it is sometimes restricted to the alimentary canal, the glands and their appendages, -- the term…

hich is capable of being greatly dilated and made rigid by the distension of the numerous blood vessels which it contains.

The bunch of looped capillary blood vessels in a Malpighian capsule of the kidney.

Pertaining to the blood or blood vessels; also, ventral. See Hemal.

formative; -- applied to a substance in early fetal life, which breaks up gradually into blood vessels.

of the seventeenth century. Haversian canals (Anat.), the small canals through which the blood vessels ramify in bone.

Relating to the blood or blood vessels; pertaining to, situated in the region of, or on the side with, the heart and great blood vessels; -- opposed to neural.

Laws relating to the equilibrium of the blood in the blood vessels.

Any discharge of blood from the blood vessels.

Livid and painful swellings formed by the dilation of the blood vessels around the margin of, or within, the anus, from which blood or mucus is occasionally discharged; piles; emerods. [The sing. hemorrhoid is rarely used.]

The part of a gland, or similar organ, where the blood vessels and nerves enter; the hilus; as, the hilum of the kidney.

the worship of images themselves. -- Image Purkinje (Physics), the image of the retinal blood vessels projected in, not merely on, that membrane. -- Virtual image (Optics), a point or system of points, on one side of a mirror or lens, which, if it existed, would emit the system of rays which actually exists on the o…

A morbid condition of any part of the body, consisting in congestion of the blood vessels, with obstruction of the blood current, and growth of morbid tissue. It is manifested outwardly by redness and swelling, attended with heat and pain.

To fill (a vessel, cavity, or tissue) with a fluid or other substance; as, to inject the blood vessels.

of pouring into a vessel; specif. (Med.), the operation of introducing a substance into a blood vessel; as, intrafusion of blood.

trument for measuring, and recording graphically, the pressure of the blood in any of the blood vessels of a living animal; -- called also kymographion.

A thread or string for tying the blood vessels, particularly the arteries, to prevent hemorrhage.

A fibrinous material exuded from the blood vessels in inflammation. In the process of healing it is either absorbed, or is converted into connective tissue binding the inflamed surfaces together. Lymph corpuscles (Anat.), finely granular nucleated cells, identical with the colorless blood corpuscles, present in the lym…