Extra Question:
Que: Name Some useful products or materials that are carried by blood.
Ans: Food, water and oxygen are the products that are carried by blood to every part of the body.
Que: circulatory system consists of three major organs. Nmae those organs.
Ans: the circulatory system consists of three major organs, blood, blood vessels and heart.
Que: Give the name of blood component which is liquid and contains 90% water.
Ans: The sticky liquid part of the bllod, containing 90% water is called plasma.
Que: Name the organ which is locted in the chest cavity with its lower tip slightly tilted towards the left.
Ans: The heart is located in the chest cavity with itsw lower tip slightly tilted towards the left.
Que: RBC contains a red colored pigment which carries oxyen with it. What is the pigment called?
Ans: The red colored pigment of RBC that carries oxygen with it is called haemoglobin.
Que: veins have valves which allow blood to flow only in one direction. Arteries do not have valves. yet the blood flow in one direstion only. Cn you explain why.
Ans: Veins have valves to prevent blood from flowing backwards and pooling, whereas arteries pump blood at very high pressures, whih naturally prevents back flow.
Que:In which from, the oxygen is transported to various body parts by heaemoglobin?
Ans: the red pigment, haemoglobin binds with oxygen to from oxyhaemoglobin which is transported to various body parts.
Que: Certain greenish - blue lines appear just belowthe skin of our hands and leg. What are these?
Ans: The greenish - blue lines that appear just below the skin of our hands and legs are veins.
Que: human blood group is divided into how many group? name them.
Ans: Human blood group is divided into four group. These are A,B, AB and O.
Que: Blood is a fluid connective tissue. Justify?
Ans: Blood is a fluid which connects all the parts of body with each other.
Que: State the function of valves?
Ans: Valves prevent the back flow of blood between chambers of heart.
Que:Skin is also considered as an excretory organ. Give reson if you agree?
Ans: Yes, skin is an excretory orgen as it secretes waste products by releasing sweat from the surface.