Question

What are the cellular components of Blood?

Answer 1

Hint:Blood is a fluid connective tissue that consists of plasma, blood cells and platelets. It circulates throughout our body delivering oxygen and nutrients to various cells and tissues. It makes up 8% of our body weight. An average adult possesses around 5-6 litres of blood.

Complete Answer:
Blood has many different functions, including :
->carrying cells and antibodies;
->transporting oxygen and other nutrients;
->bringing waste products to the kidneys and liver, to filter and clean the blood, etc.
It has 2 main components: plasma, and blood cells [red blood cells (RBCs), white blood cells (WBCs), and platelets].
>Plasma - It is the clear, liquid component of blood. It is a mixture of water, sugar, fat, protein, and salts. Its role is to transport blood cells throughout your body along with nutrients, waste products, antibodies, hormones, proteins, etc. - to maintain fluid balance in the body.
>RBCs - These are bright red in color, & are the most numerous cells in the blood - about 40 to 45% of its volume. They are shaped like a biconcave disk with a flat center (an RBC looks like a donut).
>WBCs - White blood cells protect the body from infection. They are lesser in number, than the RBCs - about just 1% of your blood. There are 5 different types of White blood cells and are classified mainly based on the presence and absence of granules - Granulocytes and Agranulocytes.
>Platelets - (also known as “thrombocytes”) -> These are actually not cells but just small cell fragments. They help in blood clotting (or coagulation) by gathering at the site of an injury. This results in the formation of a fibrin clot (which covers the wound) and prevents bleeding. Fibrin also forms the initial scaffolding (brown layer) upon which new tissue forms, thus promoting healing.

Note:Blood cells develop from hematopoietic stem cells and get formed in the bone marrow, through the process of hematopoiesis.