Water absorption through roots can be increased by keeping the plants under the fan.

In plants, water is transported through xylem.

After the few hours, the figure will be shown as follows

This figure shows that there will be an increase in the level of sugar solution in the potato piece. This increase in the level of sugar solution rises due to water that passes through the wall of potato and goes inside it.

When our cells perform their functions, certain waste products are produced. These waste products are toxic and hence need to be removed from the body. The process of removing waste products produced in the cells of the living organisms is called excretion.

The heart acts as a pump for the transport of blood. The human heart is divided into four chambers. The upper two chambers are called right and left atrium and the lower two chambers are called the right and left ventricles. The right side of the heart, i.e. the right auricle and ventricle receive carbon dioxide rich blood from all parts of the body and transport it to the lungs.
Its left side, i.e. the left auricle and ventricle, receive oxygen-rich blood from the lungs which is transported it to all parts of the body.

The red pigment (haemoglobin) present in the red blood cells of the blood makes the blood look red. The haemoglobin carries oxygen and transports it to all the parts of the body.

Blood is needed by all parts of the body due to the following reasons:
(i) All the parts of the body need food and oxygen which is carried to them by blood.
(ii) It carries CO₂ also a waste product to the lungs so that it can be exhaled easily.
(iii) It fights against diseases and infection and also helps in the formation of blood clot at the time of a cut.
(iv) It transmits heat, thus regulating the body temperature.

Transpiration is the evaporation of water from the surface of plants. It is important for plants as
(i) It generates a force which pulls up water absorbed by the roots from the soil, to reach the stem and leaves.
(ii) It also helps in cooling in plants.

Veins have valves to prevent blood from flowing backwards and pooling, whereas arteries pump blood at very high pressures, which naturally prevents backflow.

The red coloured pigment of RBC that carries oxygen with it is called haemoglobin.

The heart is located in the chest cavity with its lower tip slightly tilted towards the left.

The sticky liquid part of the blood, containing 90% water is called plasma.

The circulatory system consists of three major organs, i.e., blood, blood vessels and heart.

Food, water and oxygen are the products that are carried by blood to every part of the body.

(a) Bleeding stops after some time because some specialised cells start forming a hard covering called clot at the site of wound.
(b) Bleeding is a fluid connective tissue present in all parts of the body. Platelets are responsible for formation of clot.
(c) Mansi is helpful, knowledgeable and interested in science subject.

(a) When a cut or wound starts bleeding after some time, a clot is formed which plugs the cut and bleeding stops.
(b) Wounded area becomes dark red in colour due to clotting of blood.
(c) The blood clot is formed due to the presence of the cells called platelets in the blood.

(a) Dialysis is the process used for cleaning of the blood by separating the waste products in an artificial medium.
(b) Dialysis is needed when the excretory organ of humans, i.e. kidney becomes damaged on unfunctional due to some injury or infection.
(c) Excretion process removes the waste products released in body after the utilisation of food and other components. These products are toxic and may harm us if not removed from our body.
(d) Kidney
(e) Priya is curious, sincere and aware eager to acquire new knowledge.