31 public questions tagged with this topic.
**Arteries** have thick walls to withstand high blood pressure as they carry blood away from the heart. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Biology - Zoology portion covering relevant system and function.
Endothelial cell central therapeutic target cardiovascular gene therapy because monolayer regulates vascular homeostasis via eNOS converting L-arginine to nitric oxide stimulating soluble guanylate cyclase raising cGMP relaxing smooth muscle, prostacyclin via COX2 inhibiting platelet aggregation, barrier integrity VE-cadherin junctions, leukocyte adhesion E-selectin VCAM1. Dysfunction oxidative stress uncoupling eNOS drives atherosclerosis hypertension ischemia. Ischemic peripheral artery disease refractory angina benefit proangiogenic factors VEGF-A165, FGF4, HGF, HIF1-alpha delivered AAV1 or plasmid catheter-based intracoronary or intramuscular promoting collateral vessel formation endothelial proliferation migration MAPK ERK and PI3K Akt pathways. Heart failure SERCA2a therapy improves cardiomyocyte calcium handling but endothelial transduction improving perfusion upstream essential. Promoters Tie2, VE-cadherin, endothelin enhancer confer specificity limiting off-target expression reducing neointimal hyperplasia after percutaneous coronary intervention. Restoration barrier reduces thrombogenicity and inflammatory infiltration critical for long-term graft patency. This mechanistic insight guides vector optimization, dosing strategies, and clinical safety monitoring essential for translational development and regulatory evaluation. This mechanistic insight guides vector optimization, dosing strategies, and clinical safety monitoring essential for translational development and regulatory evaluation.
Ref: Circ Res Cardiovascular Gene Therapy Endothelial Targets 2022; NHLBI Vascular Gene Therapy Overview; Lodish Vascular Biology Endothelial Function Chap 22.
Smooth muscle, which is involuntary, lines the walls of blood vessels and regulates blood flow.
Ref: NCERT Class 11 Biology Chapter 17: Locomotion and Movement Skeletal System - Axial Skeleton - Ribs Sternum
Arteries have thick muscular walls to withstand high blood pressure exerted by the pumping action of the heart.
Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Circulatory System - Comparative and Evolutionary Aspects
The pulmonary arteries carry deoxygenated blood from the heart to the lungs.
Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Circulatory System - Comparative and Evolutionary Aspects
Pulmonary veins carry oxygenated blood from the lungs to the heart, so not all veins carry deoxygenated blood.
Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Circulatory System - Comparative and Evolutionary Aspects
Not all veins carry deoxygenated blood. Pulmonary veins carry oxygenated blood from the lungs to the heart.
Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Circulatory System - Comparative and Evolutionary Aspects
Veins have valves that prevent backflow and ensure unidirectional blood flow toward the heart.
Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Regulation and Disorders of Circulatory System
The aorta has the highest blood pressure as it receives blood directly from the left ventricle.
Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation ECG and Blood Vessels
Capillaries have the smallest diameter, allowing exchange of gases and nutrients at the tissue level.
Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation ECG and Blood Vessels
Arteries possess thick, elastic and muscular walls to withstand the high pressure generated by ventricular contraction.
Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation ECG and Blood Vessels
The vena cava carries deoxygenated blood from the body to the right atrium of the heart.
Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation ECG and Blood Vessels
