Topic:Capillaries
Capillaries in horses are small blood vessels that form a network between arterioles and venules, facilitating the exchange of oxygen, nutrients, and waste products between blood and tissues. These microvessels are integral to the circulatory system, ensuring that tissues receive adequate blood supply and metabolic exchange. The structure and function of capillaries can vary depending on the specific tissue or organ they serve, influencing factors such as permeability and flow rate. Research in equine capillary function often focuses on topics such as blood flow regulation, the impact of exercise on capillary density and function, and the role of capillaries in various equine health conditions. This page compiles peer-reviewed research studies and scholarly articles that explore the anatomy, physiology, and clinical implications of capillary function in horses.
Ultrastructural development of the equine placenta. Microcotyledons, which are a distinctive feature of the mature equine placenta, are fully formed by Day 150 of gestation. The fetal component of each microcotyledon is developed from several primary folds of trophoblast which become elaborately subdivided as gestation proceeds. These changes are reflected in the structure of the maternal crypts, which receive the fetal villi. Between Days 60 and 150 of gestation the maternal epithelium is greatly reduced in height. No such change occurs on the fetal side of the placenta, but between Days 100 and 250 a progressive indentation of the epithelium ...
Effects of histamine and acetylcholine on equine digital lymph flow and composition. We measured the flow rate and protein concentration of lymph collected from a digital lymphatic in eight anesthetized ponies. Additionally, we recorded systemic arterial pressure (Part), and small vein pressure (Psv). Control lymph flow averaged 0.068 ml/min, and contained 3.11 g/100 ml of protein with albumin/globulin ratio of 0.75. Twenty-minute local intra-arterial infusion of acetylcholine (10 mug/min.) elevated Psv but did not increase lymph flow rate or protein concentration. A 60-min local intra-arterial infusion of histamine (10 mug/min) produced a marked sustained increase in Psv and ...
[The density of the lymphatic bed of the small intestine mucosa]. The investigation was performed on 35 corpses of men, 8 corpses of cats, 7--of pigs and 5--of horses. The following methods were used: polychrome injection of arteries, veins, lymph capillaries and vessels, macro-microdissection, staining after van Gieson and with hematoxylin-eosin, impregnation with 0,25--1% solution of silver nitrate, dehydration and clearing, calculation of thickness of loops per 1 mm2 and their depth by means of ocular micrometer. The lymphatic bed of the serous membrane was established to be better developed in representatives of carnivora (cats) and omnivora (pigs), than...
Angiographic appearance of the normal equine foot and alterations in chronic laminitis. The angiographic appearance of the normal equine foot was compared with the appearance of equine feet affected with chronic laminitis. The normal foot was characterized by complete filling of the terminal arch, 8 to 10 main branches between 0.1 and 0.2 cm in diameter, a symmetrical netlike vascular pattern in the corium of the hoof, and numerous fine vessels in the corium of the coronary band. The feet affected with chronic laminitis were characterized by poor filling of the terminal arch, larger and less numerous primary branches, an irregular vascular pattern in the corium of the hoof, areas...