Total Questions: 32
The amount of water in the human body generally ranges from 55-70%. The average adult human body have about 55-65% water. The percentage of water in infants is much higher typically around 75-78%, dropping to 65-70% by one year of age. Water is the best solvent in nature.
Nearly 99% of the mass of human body consists of just six chemical elements—oxygen, carbon, hydrogen, nitrogen, calcium and phosphorus. Oxygen is the most abundant element in the human body. It is mainly found in the form of water. Water makes up generally about 55-70% of the human body and participates in countless metabolic reactions.
Almost 99% of the mass of the human body is made up of six elements, these are approximately : Oxygen (65%), Carbon (18.5%), Hydrogen (9.5%), Nitrogen (3.2%), Calcium (1.5%) and Phosphorus (1.0%). So according to question, option (d) is correct.
The number of bones in an adult human body is 206. The body of a child has about 300 bones at birth, which decreases to 206 bones by adulthood after some bones have fused together. Together these bones form the axial skeleton and the appendicular skeleton.
The stapes is the lightest stirrup-shaped bone and the smallest bone in the human body found in the middle of humans ears. While femur is the largest bone in the human body. It is located in the upper leg which connects the knee at one end and fits into the hip socket at the other.
