221 Facts Tell Me What

Skin is the outer covering on the bodies of animals or human beings. It protects muscles, bones and the internal organs. As it is in direct contact with the environment, it protects the body from viruses, parasites, etc. Other functions of the skin are insulation, temperature regulation and sensation. It also supports the production of […]

Hallucinations are imaginary sensations created by the mind. They appear real. In this situation, people imagine some imaginary situations like, they see a person, an animal, or a thing that is not there. Sometimes, it can relate with imaginary tastes as well. Some of the common reasons for hallucinations are lack of sleep, mental illness,

Shock is a condition of sorrow. In this condition the circulatory system fails to supply sufficient blood to tissues. It can be a life-threatening condition. Shock may result from trauma, heatstroke, blood loss, an allergic reaction, or other causes. Symptoms of shock can begin with restlessness and may even lead to unconsciousness. When the body

Blood pressure (BP) is the measure of the force with which the heart pumps blood in the body. It is measured with the help of the BP meter. It measures two types of pressure: systolic and diastolic. Systolic blood pressure is exerted by blood on artery walls when the heart contracts and pumps blood. Diastolic

A vaccine provides immunity against a particular disease or similar diseases. The immune system of the body is stimulated by it. It helps the immune system to remember and recognise disease-causing agents and protects the body from attacks in future. Vaccines may be given through injections, orally by mouth or using an aerosol. Some of

A ‘cold’, also called common cold, is a viral infection that attacks the upper respiratory tract. It is the most frequent infectious disease in humans. It affects the nose and the throat. During this infection, the mucous membrane of the nose and the throat becomes inflamed. The body’s immune response to the infection leads to

Humans are one of the species who laugh. Laughter is a sense of feeling good, happy and joyful. It is a response to humour, comprising two parts, gestures and production of sound. A hearty laugh triggers changes in the various parts of the body like arm, leg and trunk muscles. Fifteen facial muscles contract when

The lacrimal system is responsible for producing and secreting tears. It is situated near the eyeball. A person sheds three types of tears that are basal tears that keep the cornea nourished and lubricated; reflex tears, which help to wash out any irritant in the eyes from foreign particles like onions, and psychic or crying

Deafness is the complete inability to hear sound. It can occur at any age. A person may go deaf all of a sudden due to an accident or a severe viral infection, or gradually over time as a result of disease, nerve damage or injury caused by noise. Ear infection, fluid build-up behind the eardrum,

Colour-blindness is colour vision deficiency that is an inability or reduced ability to differentiate between colours. It is a condition in which a person is unable to perceive colour differences under normal light. Ishihara test is done using different number plates to find if the person is colour-blind. This condition arises due to a fault

Fever is a physical condition in which the temperature of the body increases higher than normal. A normal temperature can vary from person to person, but it is usually around 98.6 F. Fever can result from viral, bacterial or parasitic infections like common cold, urinary tract infection, malaria, etc. or have a non-infectious cause such

Pain is an unpleasant feeling caused by illness or injury. It indicates discomfort in some part of the body and disappears when the painful stimulus is removed or as the body heals. Pain can also result due to an injury or a surgery. It hampers the daily routine of a person considerably. It can be

Warts are skin infections on the top layer of the skin. They are caused by the viruses of the ‘human papillomavirus’ (HPV) family. They occur when the outer layer of skin gets infected by this virus through a tiny scratch or cut. Then a rapid growth of cells on the outer layer of skin occurs

Muscles are the bundles of soft tissues in the bodies of animals. They are joined with bones and nerves. They help produce movement and keep the body parts in position. There are three types of muscles: skeletal muscles, smooth muscles and cardiac muscles. They constitute the major body mass of an organism. Skeletal muscles help

Freckles are cells containing colour present in the skin in small batches. They are flat, small and light brown in colour. People with a fair complexion, especially kids, are likely to get freckles. They appear when skin produces more melanin. Melanin is a pigment produced by skin cells to protect the skin from damage by