Question

Name the largest: a) artery b) vein in our body.

Answer 1

Largest artery:

1. The aorta, which connects the heart's left ventricle to the main high-pressure pipeline, is the biggest artery.
2. The blood channels that transport oxygen-rich blood from the heart to the body's tissues are known as arteries.
3. Each artery is a muscular tube with three layers of smooth tissue lining it: The intima is the inner layer of the artery, which is lined with a smooth tissue called the endothelium. The media is a layer of muscle that allows arteries to handle the heart's high pressures. The adventitia is a connective tissue that connects arteries to surrounding tissues.
4. The aorta splits into a network of smaller arteries that go all over the body. Arterioles and capillaries are the smallest branches of the arteries. The pulmonary arteries are remarkable in that they transport oxygen-depleted blood from the heart to the lungs under low pressure.

Largest vein:

1. Large veins that carry deoxygenated blood from the body to the heart are known as the vena cavae. There are two types of vena cava in humans: superior vena cava and inferior vena cava. The superior vena cava is the larger of the two vena cava that transports deoxygenated blood from the systemic circulation to the heart's right atrium.
2. The superior vena cava measures 24 mm in diameter. The veins that receive venous blood return from the upper portion of the body, above the diaphragm, are short in length. The superior vena cava is the body's largest vein.
3. The inferior vena cava is a major vein that transports deoxygenated blood from the lower and intermediate bodies to the heart's right atrium.