上海交通大学：《生物传热学教与学 Bioheat Transfer》课程教学资源（电子讲义）Lecture 15：Anatomy and Description of Microvasculature

Lecture 15:Anatomy and Description of Microvasculature

Lecture 15: Anatomy and Description of Microvasculature

Study of Microvasculature To supply nutrients through circulatory network system in biological body To regulate the body temperature and organ function through shunting mechanism for blood re-distribution

Study of Microvasculature To supply nutrients through circulatory network system in biological body To regulate the body temperature and organ function through shunting mechanism for blood re-distribution

Skeletal Muscle Major branches of arteries in skeletal muscle run parallel to muscles; No paired arteriols and venules at the pre- capillary level 。Capillaries

• Major branches of arteries in skeletal muscle run parallel to muscles; • No paired arteriols and venules at the pre￾capillary level • Capillaries Skeletal Muscle

Casts of muscle vasculature viewed by SEM.Rat skeletal muscle, X60.BV:blood vessel.CP:capillary plexus

Casts of muscle vasculature viewed by SEM. Rat skeletal muscle, ×60.BV:blood vessel. CP: capillary plexus

Casts of muscle vasculature viewed by SEM.Higher magnification of CP X330.Arrows:transverse capillary loops

Casts of muscle vasculature viewed by SEM. Higher magnification of CP, ×330. Arrows: transverse capillary loops

Heart Pulmonary Vena artery cava Coronary arteries,accompanied by two or more veins. Circumflex A 160-um vein giving rise to small venules and branching rapidly into parallel capillaries. LAD Coronary veins(blue) Non directional Temporal distribution of capillaries:perfused during diastolic;collapsed during systolic

Coronary arteries, accompanied by two or more veins. A 160-um vein giving rise to small venules and branching rapidly into parallel capillaries. Non directional Temporal distribution of capillaries: perfused during diastolic; collapsed during systolic Heart

Liver Relatively high capillary volume fraction The liver receives the blood both from the hepatic artery and the vein. Most blood comes from the portal vein:inlet temperature higher Organization of liver tissue.Casts of bushlike distributions of sinusoids(s)that drain toward a central vein(CV).Conducting(CPV)and distributing(DPV)branches of a portal vein in a portal area (PA)are shown

Organization of liver tissue. Casts of bushlike distributions of sinusoids (s) that drain toward a central vein (CV). Conducting (CPV) and distributing (DPV) branches of a portal vein in a portal area (PA) are shown. Liver Relatively high capillary volume fraction The liver receives the blood both from the hepatic artery and the vein. Most blood comes from the portal vein: inlet temperature higher

Lung Casts of capillary network surrounding pulmonary alveoli. The casting resin fills the alveoli, ×415. Length of the capillaries comparable with their diameters,commonly oval

Casts of capillary network surrounding pulmonary alveoli. The casting resin fills the alveoli, ×415. Length of the capillaries comparable with their diameters, commonly oval Lung

Skin Upper dermis f⑥Endothelium 5μ discontinuous 15μ smooth muscle 40-604 Endothelium Smooth muscle single layer 50r 50μ Mid-dermis Thick endothelium Collagen Few layers of loose elastic tissue 00-400μ smooth muscle Endothelium Deep dermis with ill defined elostic Internal elastic lomina Smooth muscle Artery several layers Vein Diagram of most frequent vascular pattern and structure in adult human skin

Diagram of most frequent vascular pattern and structure in adult human skin. Skin

Kidney 2 Organization of the kidney(1)Three nephron units drained by collecting tubules(2) Vasculature supplying the regions of the nephron. The highest perfusion rate of the blood

Organization of the kidney (1) Three nephron units drained by collecting tubules (2) Vasculature supplying the regions of the nephron. The highest perfusion rate of the blood. Kidney