ANATOMY

Detailed explanation-1: -jugular vein, any of several veins of the neck that drain blood from the brain, face, and neck, returning it to the heart via the superior vena cava.

Detailed explanation-2: -The blood vessels that drain the head, neck, and upper extremities are known as brachiocephalic vein. The brachiocephalic vein is the most prominent blood vessel that arises from the junction of two blood vessels called the subclavian vein and jugular vein.

Detailed explanation-3: -ANATOMY OF THE THORACIC VEINS. The superior vena cava (SVC) starts at the confluence of the brachiocephalic veins behind the first right costal cartilage, and ends at the level of the third right costal cartilage where it drains into the right atrium.

Detailed explanation-4: -Your inferior vena cava, your body’s largest vein, carries oxygen-depleted blood back to your heart from the lower part of your body (below your diaphragm). Your superior vena cava, your second biggest vein, brings oxygen-poor blood from your upper body to your heart.

Detailed explanation-5: -The brain is a tremendously well-perfused organ, receiving up to 20% of the resting cardiac output. This blood flow reaches the brain via the internal carotid arteries and the vertebral arteries and ultimately gets drained by the internal jugular veins.