Human Circulatory System

One quarter of the total blood output from the heart comes to the kidneys along the renal artery. Two renal arteries arise from the abdominal section of the aorta, each artery supplies a lobe of the kidney. The incoming artery divides into four or five branches, eventually forming arterioles, each of which leads to the compact ball of capillaries called the glomerulus.

This answer is correct. The heart is the central pumping organ of the blood vascular system. The pure blood is pumped from here and impure blood is pumped back, i.e. the control of blood circulation is carried out from the heart. Hence, it works like a central power station of the body.

This is the correct answer. The right ventricle pumps blood into the pulmonary trunk, which divides into the pulmonary arteries going to the lungs; then blood is returned to the left atrium from the lungs through the pulmonary veins. This is called the pulmonary circulation. Hence, this part is not involved.

This answer is correct. The left ventricle ejects blood into the aorta, which further supplies the blood via arteries to tissues and organs(except the lungs).

This answer is correct. The blood does not remain confined to blood vessels, but it flows freely through the body cavity and channels called lacunae and sinuses in the tissues.

This answer is the correct path. Tissue fluid enters tiny channels called lymph vessels, which ultimately drain into two large lymph vessels called thoracic duct and the right lymphatic duct. These open into veins returning the lymph finally into venous blood and thus, in the general circulatory system.

This is the correct answer. The blood pressure is low in veins because the blood flows through narrow arterioles and capillaries to enter wider veins. There are many valves inside the veins. These valves permit the flow of blood in the veins towards the heart and prevent blood flow in the reverse direction.

Transplantation refers to the surgical procedure of transferring organs, tissues, or cells from one body to another or within the same body. Common examples include kidney, liver, and heart transplants. While blood transfusions and cell transplants exist, the term typically refers to whole organs.

Veins have one-way valves that prevent blood from flowing backward. This ensures blood returns efficiently to the heart against gravity.

Arteries carry oxygenated blood away from the heart to various body parts. The aorta is the largest artery, distributing blood from the left ventricle throughout the body. Veins return blood to the heart, while arteries form the high-pressure distribution network.

An angiograph (or angiogram) is an imaging technique specifically used to visualize blood vessels in the heart. It helps diagnose coronary artery disease and blockages. Brain imaging uses cerebral angiography, kidney uses renal angiography, and abdomen uses abdominal angiography.

It provides nourishment to the tissues of the heart through the capillaries that are located in the heart.

Thrombosis refers to the formation or presence of a blood clot (thrombus) within a blood vessel, which can obstruct blood flow. Deep vein thrombosis (DVT) in legs and pulmonary embolism are common and dangerous forms. Risk factors include prolonged immobility, surgery, pregnancy, and certain medical conditions that affect blood clotting.

The right atrium is one of four chambers in the hearts of mammals. It receives deoxygenated blood from the superior and inferior vena cava and the coronary sinus, and pumps it into the right ventricle through the tricuspid valve.