Advertisements
Advertisements
प्रश्न
Explain the structure and function of human blood.
Advertisements
उत्तर
Blood is a fluid connective tissue that flows in blood vessels. It is composed of two components-plasma and blood cells.
Plasma is a yellowish colour fluid, made up of water (~90%) and some dissolved nutrients, proteins, hormones, and waste products.
Blood consists of three types of blood cells. These are
- Red Blood Cells: They contain a red pigment called hemoglobin, which transports oxygen to all body cells.
- White Blood Cells: They fight against germs that enter the body. Thus, they protect the body from diseases.
- Platelets: When we get injured, bleeding stops after some time. This happens because of the activity of platelets, which help in the clotting of blood.
Functions of blood:
- It transports nutrients and oxygen to the different parts of the body.
- It also carries waste materials (from the different parts of the body) to be removed by the excretory organs.
- Chemical messengers like hormones are transported by the blood.
- Protects the body from disease-carrying germs.
- Helps to maintain a constant body temperature.
संबंधित प्रश्न
The blood from the heart is transported to all parts of the body by the ______.
Heart sounds are produced due to ______.
-
closure of tricuspid and bicuspid valves
-
rushing of blood through valves producing turbulence
-
closure of atrioventricular and semilunar valves
-
entry of blood into auricles
Blood consists of two parts - a liquid part and a cellular part. Name these parts and briefly write about them
Name the three kinds of blood vessels found in human beings. With the help of suitable diagrams, differentiate between them.
True or false:
Impure blood is received by the right auricle.
State the Location:
Tonsils
State the Location: Bicuspid value
The stomach is like a ______.
Spleen is referred to as ______.
Hematocrit is ______.
