Answer:
(a) Heart - (iii) Circulatory system
The heart is the major body part that helps in pumping oxygenated blood to the various body part and take back deoxygenated blood to the heart again.
b) Small intestine - (i) Digestive system
It is part of the digestive system and helps in digestion. The small intestine is the part of the GI tract.
(c) Brain - (vi) Nervous system
Brain controls and gets stimulus with help of neurons and act according to the information in the nervous system of individuals.
(d) Kidneys - (v) Excretory system
Kidneys are the major part of the excretory system as they filter the blood and remove the waste from the blood.
(e) Nose (ii) Respiratory system
The respiratory system includes the nose as the inhalation and exhalation both are accompanied by the nose and it filters the air and sends air to and from the lungs
(f) Bones (iv) Skeletal system
The skeletal system is made up of the bones that provide support to the body of an individual organism and helps in the movement.
We know that electrons are negatively charged, so we need to explain why electrons are orbiting the atom in the first place. The only logical explanation for this is by saying that there is a positive charge in the atom somewhere that attracts the negatively charged electrons to the atom.
