Table of Contents
What structures connect arteries and veins?
Capillaries, the smallest and most numerous of the blood vessels, form the connection between the vessels that carry blood away from the heart (arteries) and the vessels that return blood to the heart (veins). The primary function of capillaries is the exchange of materials between the blood and tissue cells.
What arteries and veins are connected to the heart?
Upper Body Circulation The aorta is the large artery leaving the heart. The superior vena cava is the large vein that brings blood from the head and arms to the heart, and the inferior vena cava brings blood from the abdomen and legs into the heart.
What part of the heart are arteries connected to?
The heart receives its own supply of blood from the coronary arteries. Two major coronary arteries branch off from the aorta near the point where the aorta and the left ventricle meet. These arteries and their branches supply all parts of the heart muscle with blood.
Which heart structure connects the largest veins and arteries?
The aorta is the largest of the arteries in systemic circulation. Blood is pumped from the left ventricle through the aortic valve into the aorta.
What is tunica intima made of?
The tunica intima consists of a layer of endothelial cells lining the lumen of the vessel, as well as a subendothelial layer made up of mostly loose connective tissue.
What is the structure of the veins?
Structure of a vein, which consists of three main layers. The outer layer is connective tissue, called tunica adventitia or tunica externa; a middle layer of smooth muscle called the tunica media, and the inner layer lined with endothelial cells called the tunica intima.
What are the structures of the heart?
The heart is divided into four chambers consisting of two atria and two ventricles; the atria receive blood, while the ventricles pump blood. The right atrium receives blood from the superior and inferior vena cavas and the coronary sinus; blood then moves to the right ventricle where it is pumped to the lungs.
What are tube like structures that include the arteries arterioles capillaries venules, and veins?
are tube-like structures that include the arteries, arterioles, capillaries, venules, and veins. Thick-walled, muscular, flexible tubes that carry oxygenated blood away from the heart to the arterioles.
Do arterioles have vasa vasorum?
The vasa vasorum, a network of small vessels that supplies the cells of larger vessels, is present in their adventitia and outer part of the media. Arterioles contain an internal elastic lamina and one or two layers of smooth muscle cells.