1. Define Circulatory system with its parts.
- The conducting system of the body which co-ordinates the transportation of nutrients, oxygen, enzyme, medicine etc to the tissues and collection of waste products from the tissues to the excretory sites is known as the circulatory system. Its parts are:
2. Define blood.
- The thick red colored liquid connecting tissue containing 55% of plasma and 45% of blood cells is known as blood.
3. Define plasma. Enlist function of plasma.
- The yellowish transparent liquid found in blood is called plasma. It contains 90% water and 10% protein, fat, salt and carbohydrate. Its functions are;
a. Fibrinogen in plasma helps in blood clotting.
b. It controls the flow and composition of water in blood.
c. It carries carbon dioxide from cells to lungs.
d. It transport hormones to the tissues.
4. Write the functions of blood cells.
- The functions of blood cells are as follows:
R.B.Cs or erythrocytes
a. It contains the red pigment called haemoglobin which makes blood red in color.
b. To pick up oxygen from the lungs and deliver it to the tissues elsewhere.
WBCs or leucocytes
a. It help fight infections by attacking bacteria, viruses and germs that invade body.
b. It aids the immune system.
Platelets or thrombocytes.
a. It helps in blood clotting.
b. They protect body from loss of blood.
5. What are the disease caused due to deficiency and more count of RBCs and WBCs?
- The diseases caused due to the deficiency of RBCs and WBCs are anemia and polycythemia respectively and that due to more count is leucopenia and leukemia respectively.
No comments:
Post a Comment