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Human tears. Tears are a clear liquid secreted by the lacrimal glands (tear gland) found in the eyes of all land mammals. [1] Tears are made up of water, electrolytes, proteins, lipids, and mucins that form layers on the surface of eyes. [2]
Villagers tend their fields in the Pech River Valley, Kunar Province, Afghanistan. Dara-I-Pech District (also known as Manogay District or Pech District [1]) is located in western-central Kunar Province, Afghanistan, 30 km west of Asadabad.
The blood cockle is the main clam variety raised in the mud flats of Anhai Bay off Shuitou, Fujian. [4] Capture (blue) and aquaculture (green) production of Blood cockle (Tegillarca granosa) in thousand tonnes from 1950 to 2022, as reported by the FAO [5]
Vasculitis is a group of disorders that destroy blood vessels by inflammation. [2] Both arteries and veins are affected. Lymphangitis (inflammation of lymphatic vessels) is sometimes considered a type of vasculitis. [3]
Blood plasma volume may be expanded by or drained to extravascular fluid when there are changes in Starling forces across capillary walls. For example, when blood pressure drops in circulatory shock, Starling forces drive fluid into the interstitium, causing third spacing.
Diagram showing the development of different blood cells from hematopoietic stem cells to mature cells.. A blood cell (also called a hematopoietic cell, hemocyte, or hematocyte) is a cell produced through hematopoiesis and found mainly in the blood.
Microangiopathy (also known as microvascular disease, small vessel disease (SVD) or microvascular dysfunction) is a disease of the microvessels, small blood vessels in the microcirculation. [1]
The lack of nutrients in the diet, or the lack of a balanced diet, can contribute to the discoloration of the area under the eyes. It is believed that iron deficiency and vitamin B 12 deficiency can cause dark circles as well. [7]