ANATOMY

GENERAL ANATOMY

ANATOMY OF THE HEART

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following is a key characteristic of a Vein?
A
They have thick muscular walls
B
They deal with blood under high pressure
C
They are one cell thick
D
They move blood back towards the heart
Explanation: 

Detailed explanation-1: -The veins have thin walls. There are valves present in the veins that allows blood to flow only in one direction, towards the heart.

Detailed explanation-2: -They have thin muscular walls with valves. Blood flows smoothly and under low pressure in the veins.

Detailed explanation-3: -Oxygen-poor blood returns from the body to the heart through the superior vena cava (SVC) and inferior vena cava (IVC), the two main veins that bring blood back to the heart.

Detailed explanation-4: -When a vein is torn or severed, the blood that flows out will be dark red or bluish. That’s because it no longer has oxygen. Plus, since venous blood is moving to the heart, it’s under less force than arterial blood. It will “ooze” like a thick liquid, flowing steadily out of the body.

Detailed explanation-5: -What are Vein Valves? Interspersed throughout your veins are small crescent-shaped flaps of tissue, known as valves, that help prevent a backflow of blood. These valves project from the innermost layer of the vein wall to the center of the vein and are angled towards the heart in the direction of venous blood flow.

There is 1 question to complete.