the walls of both arteries and veins consist of three layers called

innermost layer of the vessel structure. Consists of simple squamous epithelium-endothelium- and produces chemicals that cause blood vessels to dilate or constrict

Middle layer of the vessel structure that is the thickest. allows the vessel to change diameter and is composed of smooth muscle and elastic tissue (considered muscle layer) stimulated by the autonomic nervous system

Outer layer of the vessel structure and is made of strong, flexible, and fibrous connective tissue. supports and protects the vessel

The arteries closest to the heart are the largest.

These are the body's largest arteries. AKA elastic arteries; They expand as blood surges into them and recoil when ventricles relax.

AKA Muscular arteries; They carry blood further away from the heart and to specific organs and areas of the body

These are the smallest arteries, AKA resistance vessels because they resist the flow of blood; they are connected to capillaries by short connecting vessels called metarterioles

select all the components that describe veins

Why are veins called capacitance vessels

These veins include the vena cavae, pulmonary veins, and internal jugular veins. Formed by the convergence of medium-sized veins; contain thick tunica externa

Formed by convergence of venules on their route toward the hear. have more elastic walls and contain on-way valves. Ex., Radial and ulnar veins of the forearms

smallest veins and collect blood from the capillaries. have a tunica media that is poorly developed resulting in very thin vessel walls. they are porous and exchange fluid with surrounding tissues

Aka exchange vessels that are microscopic that link arterioles to venules

Why are capillaries important

Select all that applies to where the largest numbers of capillaries are found due to high metabolic rates

Select the areas that don't have any capillaries

capiallaries are organized into networks called

unique capillary found in liver and bone marrow that allows for passage of large substances such as proteins

the most important mechanism of capillary exchange, substances move from areas of greater to lesser concentration

process whereby albumin in the blood pulls tissue fluid into capaillaries

Process of removing particles from a solution by allowing the liquid portion to pass through a membrane

What is the purpose of the valves in veins?

what are the exchange vessels of the circulatory system where nutrients, wastes, and hormones are transferred between blood and tissues

The reason blood flow is slowest in the capillaries

Select the reasons that may cause edema

The primary mechanism by which capillaries relese oxygen and take up carbon dioxide from surrounding tissues is the process of