After understanding of nutrition and respiration, lets move further for the concept of Blood. As we know blood is circulating throughout the body. Blood can be defined as a fluid connective tissue that transport the oxygen and nutrients through out the body. Blood have many roles in body.
Functions of blood :
- Blood regulates the body temperature.
- Transportation of nutrients and hormones throughout the body.
- Protection of body from invading pathogens.
- Regulate the pH and ions in the body.
Blood is made up of 2 types of components : Blood plasma and cells of blood.
1.) Blood plasma :Blood plasma is consist of water, ions, proteins, nutrients, waste and gases, minerals. It is straw colored fluid. As we can see in diagram, the blood is made up of 55 % blood plasma. The proteins which are present in blood plasma arecalled plasma proteins.
2. Cells of blood : Cells of blood also called as formed elements. These formed elements comprises 45 % of blood. Formed elements are divided into 3 types :
WBC (White blood Cells) :WBC life span is 13-20 days. WBC are also called as leucocytes. They circulate throughout the body and helps the body to prevent infections. WBCs can be granulated or agranulated. Granulated WBC meaning they contains small granules in their structure. Those of agranulated WBC don’t have granules in their structure.
Granulated WBC can be divided into 3 types :
- Basophil : It is a type of WBC, present only near 1% in whole blood. They are granulated WBC, that means they have granules in their structure. The number of basophils increase in allergic reactions.
- Eosinophil : It is also type of granulated WBC. They play an important role in immune system, to fight against the infectious diseases. They also present only near 1% in whole blood.
- Neutrophils : It is the major type of WBC containing granules, present abundantly in blood. Hence have many functions in the blood they destroy bacteria and fungi which may be present in the blood.
Agranulated WBC are divided into 2 types :
- Lymphocytes :Lymphocytes are the second most common WBC in blood. They are agranulatedthat means theses ells don’t have small granules in their structure. These lymphocytes are helps to fight against the infection.
- Monocytes : The monocytes which are present in blood are as their name suggest mono = single, that means they are single nucleated cells.
RBC (Red Blood Cells) :RBCs are biconcave shaped cell, which is transporting oxygen in the tissues. RBCs are also called as erythrocytes. RBCs life span is 120 days. In the healthy individual count of RBC is 5.4 million in adult male whereas 4.8 million in adult female. They are transporting oxygen means they must have oxygen carrying protein called as hemoglobin. Hemoglobin is red colored protein in the body. A healthy individual have 12-16 gm of hemoglobin in blood.
Functions of RBC :
- RBC carry out oxygen and carbon dioxide through the lungs.
- Provides iron to the body.
C. Platelets : Platelets are also called as thrombocytes. They are not actually whole cells in the body, but are cell fragments. The normal count of platelets in adult 150,000 to 400,00 per microliter of blood As the name suggest they are thrombocytes, they functions in the clotting of blood. Life span of platelets are 5 to 9 days.
Question and answers :
1.) What is blood ?
Answer :- Blood can be defined as a fluid connective tissue that transport the oxygen and nutrients through out the body.
2.) What are the components of blood ?
Answer :- Blood is made up of 2 types of components : Blood plasma and cells of blood.
3.) What is leucocytes ?
Answer :- WBC are also called as leucocytes. They circulate throughout the body and helps the body to prevent infections. WBCs can be granulated or agranulated. Granulated WBC meaning they contains small granules in their structure. Those of agranulated WBC don’t have granules in their structure.
4.) What are erythrocytes ?
Answer :- RBCs are biconcave shaped cell, which is transporting oxygen in the tissues. RBCs are also called as erythrocytes.
5.) What are platelets ?
Answer :- Platelets are also called as thrombocytes. They are not actually whole cells in the body, but are cell fragments.
6.) What is the normal life span of WBC ?
Answer :- WBC life span is 13-20 days. WBC are also called as leucocytes.
7.) What is the normal life span of RBC ?
Answer :- Life span of RBC is 120 days.
8.) What is the normal life span of platelets ?
Answer :- Life span of platelets are 5 to 9 days.
9.) What are the types of WBC ?
Answer :- WBCs can be granulated or agranulated. Granulated WBC meaning they contains small granules in their structure. Those of agranulated WBC don’t have granules in their structure.
10.) Explain WBC in detail.
Answer :- WBC life span is 13-20 days. WBC are also called as leucocytes. They circulate throughout the body and helps the body to prevent infections. WBCs can be granulated or agranulated. Granulated WBC meaning they contains small granules in their structure. Those of agranulated WBC don’t have granules in their structure.
Granulated WBC can be divided into 3 types :
1.) Basophil : It is a type of WBC, present only near 1% in whole blood. They are granulated WBC, that means they have granules in their structure. The number of basophils increase in allergic reactions.
2.) Eosinophil : It is also type of granulated WBC. They play an important role in immune system, to fight against the infectious diseases. They also present only near 1% in whole blood.
3.) Neutrophils : It is the major type of WBC containing granules, present abundantly in blood. Hence have many functions in the blood they destroy bacteria and fungi which may be present in the blood.
Agranulated WBC are divided into 2 types :
1.) Lymphocytes : Lymphocytes are the second most common WBC in blood. They are agranulated that means theses ells don’t have small granules in their structure. These lymphocytes are helps to fight against the infection.
2.) Monocytes : The monocytes which are present in blood are as their name suggest mono = single, that means they are single nucleated cells.
11.) What is the function of RBC ?
Answer :- RBC carry out oxygen and carbon dioxide through the lungs and Provides iron to the body.
12.) What is the function of platelets ?
Answer :- Platelets are also called as thrombocytes. They are not actually whole cells in the body, but are cell fragments. The normal count of platelets in adult 150,000 to 400,00 per microliter of blood As the name suggest they are thrombocytes, they functions in the clotting of blood.