Question

Which has the largest volume of blood?
A. Heart
B. Arteries and Arterioles
C. Veins and venules
D. Capillaries

Answer 1

Blood is a bodily fluid found in humans and other animals that carries metabolic waste products away from cells while also delivering essential chemicals such as nutrition and oxygen. It is made up of blood cells suspended in blood plasma in vertebrates.

Complete answer:
One of the most vital components of life is blood. Blood is found in almost every mammal with a circulatory system. Blood was thought to have evolved from a sort of cell that was responsible for phagocytosis and feeding on an evolutionary standpoint. Blood and the circulatory system have aided the evolution of increasingly sophisticated lifeforms over billions of years.
Plasma, blood cells, and platelets make up blood, which is a fluid connective tissue. It transports oxygen and nutrients to all of our cells and tissues as it circulates throughout our bodies. It accounts for about 8% of our total body weight. A typical adult has about 5-6 litres of blood.
Blood is made up of cells known as created components of blood, as we've seen. In the body, these cells have their own tasks and responsibilities to perform. The following are the blood cells that circulate throughout the body:
Red blood cells (Erythrocytes): In humans, RBCs, also known as erythrocytes, are biconcave cells with no nucleus. RBCs contain hemoglobin, an iron-rich protein that gives blood its red color. The most abundant blood cells generated in bone marrow are RBCs. They are primarily responsible for transporting oxygen from and to numerous tissues and organs.
White blood cells (Leucocytes): Leukocytes are blood cells that are colorless. They are colorless due to the lack of haemoglobin. Granulocytes and agranulocytes are two types of granulocytes. WBCs are primarily involved in immunity and defense mechanisms.
The heart has the biggest amount of blood, and the left ventricle is responsible for pumping blood to the rest of the body. As a result, the heart pumps around 280 liters every hour, and 7200 liters per day.

Thus, the answer is option A: Heart.

Note:
The inferior and superior vena cava, two major veins that discharge oxygen-poor blood from the body into the right atrium of the heart, bring blood into the heart. Blood flows from your right atrium into your right ventricle through the open tricuspid valve as the atrial contracts.