True/False: Mark the following statements as true (T) or false (F). If the state

Question

True/False: Mark the following statements as true (T) or false (F). If the statement is false, correct it to make it a true statement.

______ a. The three major circuits of blood flow in the body are the systemic, cerebral, and pulmonary circuits.

______ b. The external carotid arteries and vertebral arteries supply blood to the brain.

______ c. Blood is drained from the brain by a set of dural sinuses.

______ d. Venous blood from the spleen, digestive tract, and pancreas drains into the inferior vena cava.

Explanation / Answer

a True

3 circuits are systemic, cerebral and pulmonary.

Pulmonary circulation consist of pulmonary arteries and veins, Pulomonary arteries supplies the deoxygenated blood to lungs while pulmonary veins return oxygenated blood to heart.

Systemic circuit It carries blood away from heart, distributes blood to different organs and after delivery it blood is returned back to heart.

Cerebral circuit is composed of cerebral arteries and veins which supplies the blood to the brain. Arteries deliver oxygenated blood to the brain while veins deliver deoxygenated blood to the heart. This is important in maintaining cerebral blood flow.

b. False

Brain gets blood supply from 2 arteries internal carotid and vertebral arteries.

Vertebral arteries in association with medullary arteries supply blood to the spinal cord.

c. True

Dural sinuses. These are teh spaces or cavities between meaningeal layer and periosteal layer of duramater.

d TRUE

Inferior vena cava receives blood from lower body parts(abdominal and pelvic region) . It is drained from both sides , right side it is drained by gonadal and suprarenal vein while on the left side by renal vein which drains inferior vena cava.

Hepatic portal vein collects bllod from spleen,digestive tract, pancreas and gallbladder to liver.

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