This answer is correct. Angina is caused by reduced blood flow to the heart muscle. The blood carries oxygen which is needed by the heart muscle in order to survive.

This is the correct answer.

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).

Digested food materials to provide energy and growth of the body, hormones, metabolic wastes, enzymes, various gases (oxygen and carbon dioxide), etc. are transported from one part of the body to another. Hence, this option is the correct answer.

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 correct. The heart beats originate from a muscle, but it is regulated by nerves.

This answer is correct. The closure of AV-valve at the beginning of ventricular systole produces a sound “lubb” and is known as the first heart sound.

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 answer is correct. When the heart beats, it contracts and pushes blood through the arteries to the rest of the body. This force creates pressure on the arteries. This is called systolic blood pressure.

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.

Both options (2) and (3) are correct. Hence this option (4) is the correct answer.

Coronary Artery Disease is caused due to damage in the blood vessels of heart tissues. Basically, it is caused due to the deposition of excess of calcium, fat, cholesterol and fibrous tissues, which make the lumen of arteries narrower. Hence, this option is correct.

The rate of lymph formation is equal to the rate of its return to the blood stream. But, sometimes the formation rate of lymph exceeds the rate of its return to the blood. Then the increased volume of fluid around the cells creates a swelling called dropsy or oedema. Hence, this answer is correct.