Which description best describes arteries?
Arteries are blood vessels that carry blood away from the heart. This blood is normally oxygenated, with the exception of blood in the pulmonary artery. Arteries typically have a thicker tunica media than veins, containing more smooth muscle cells and elastic tissue.
Which statement is true of arteries?
Which statement is true of arteries? They always carry oxygenated blood. They always carry blood away from the heart.
What statement best describes arteries quizlet?
Which statement best describes arteries? All carry oxygenated blood to the heart. All carry blood away from the heart. All contain valves to prevent the backflow of blood.
Which statement best describes arteries all carry oxygenated blood to the heart?
All carry blood toward the heart. Only large arteries are lined with endothelium. Only the pulmonary artery carries oxygenated blood.
Which of the following is a true statement about arteries and veins?
Which of the following is a true statement about arteries and veins? The walls are thinner in veins than in arteries, and valves are present only in veins. … The heart has X valves that permit the blood to flow in only one direction.
What’s the main artery called?
The largest artery is the aorta, the main high-pressure pipeline connected to the heart’s left ventricle. The aorta branches into a network of smaller arteries that extend throughout the body. The arteries’ smaller branches are called arterioles and capillaries.
Which of the following statements describe the location and position of the heart?
The heart is located near the anterior chest wall, directly behind the sternum. The base of the heart is the superior portion where the largest veins and arteries are attached.
Which statement about arteries and veins is correct quizlet?
Arteries have valves, but veins do not. Arteries have smooth muscle in their walls, but veins do not. Arteries have a thicker tunica media than veins.
What do arteries do?
Arteries carry blood away from the heart and veins carry blood back to the heart. The circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide.
Which of the following statement is true about veins?
It is the pressure exerted by the blood on the walls of any vessel. 2. It decreases in the arteries as the distance from the heart increases. … It is lower in the capillaries than in the arteries.
Which statement is correct for an artery and vein of the same diameter?
For an artery and vein of the same diameter, the vein would have a thicker wall. Veins contain valves and arteries do not. Blood pressure is lower in arteries than in veins.
Do arteries have valves?
Arteries also contain a strong, muscular middle layer that helps pump blood through the body. … Unlike arteries, veins contain valves that ensure blood flows in only one direction. (Arteries don’t require valves because pressure from the heart is so strong that blood is only able to flow in one direction.)
What are elastic arteries?
Elastic arteries are those nearest the heart (aorta and pulmonary arteries) that contain much more elastic tissue in the tunica media than muscular arteries. This feature of the elastic arteries allows them to maintain a relatively constant pressure gradient despite the constant pumping action of the heart. Arterioles.
How do arteries differ from veins?
Arteries are blood vessels that carry oxygen-rich blood away from the heart to the body. Veins are blood vessels that carry blood that is low in oxygen from the body back to the heart for reoxygenation.
How do arteries differ from veins quizlet?
Arteries are vessels that carry blood away from the heart; Veins carry blood toward the heart.
Which statement about Precapillary sphincters is correct?
Which statement about precapillary sphincters is CORRECT? They contract when oxygen levels in the tissue are low. They can close off the capillaries by contracting. They are openings that allow large molecules and blood cells to leave the capillary.
What are 3 differences between arteries and veins?
Arteries carry oxygenated blood except pulmonary artery. Veins carry deoxygenated blood except pulmonary vein. … Arteries have thick elastic muscular walls. Veins have thin non elastic less muscular walls.
What do arteries carry quizlet?
Arteries carry oxygenated blood from the heart to all the structures of the body.
Do arteries contain a sphincter?
Their function is critical: If all of the capillary beds in the body were to open simultaneously, they would collectively hold every drop of blood in the body and there would be none in the arteries, arterioles, venules, veins, or the heart itself. Normally, the precapillary sphincters are closed.
Do veins have a sphincter?
Precapillary sphincters: (a) Precapillary sphincters are rings of smooth muscle that regulate the flow of blood through capillaries; they help control the blood flow to where it is needed. (b) Valves in the veins prevent blood from moving backward.
Which arteries connect the basilar artery and the internal carotid artery forming the posterior aspect of the cerebral arterial circle?
The right and left posterior cerebral arteries arise from the basilar artery, which is formed by the left and right vertebral arteries. The vertebral arteries arise from the subclavian arteries.
Where are the arteries?
Arteries are found in all parts of the body, except in the hairs, nails, epidermis, cartilages, and cornea. The larger trunks usually occupy the most protected situations; in the limbs, they run along the flexor surface, where they are less exposed to injury.
Why are arteries more elastic than veins?
Arteries have thicker walls than veins because they must be able to withstand the tremendous pressure from a beating heart. … As heart pumps out blood through arteries to different parts of the body, thereby blood flows in high pressure in arteries and can withstand ,so its more elastic than veins.