Cat fur contains allergenic proteins, notably a protein called Fel d 1. This protein is present in the cat's saliva, sebaceous glands, and sweat glands. When the...
Caffeine is a stimulant naturally present in coffee as well as in other beverages such as tea and energy drinks. When we consume coffee, caffeine...
Natural light affects the circadian rhythm, also known as the internal biological clock, which regulates the wake-sleep cycles over a period of about 24 hours. This clock...
Insulin syringes have very fine needles for several reasons. First of all, insulin is a medication that must be administered by subcutaneous injection, which means...
When a virus such as Ebola enters the body, it mainly targets cells of the immune system, especially macrophages and dendritic cells. These cells are...
Insulin is a hormone produced by the beta cells of the pancreatic islets of Langerhans. Its main role is to regulate blood sugar by allowing...
The diaphragm is a dome-shaped muscle located under the lungs, separating the thoracic cavity from the abdominal cavity. During inspiration, the diaphragm contracts and flattens, increasing the...
Digestion after a heavy meal begins in the mouth, where food is chewed and mixed with saliva, which contains enzymes such as amylase. Once swallowed, the food...
The cry of human babies is often perceived as irritating due to two main characteristics: its high pitch and frequency. Simply put, pitch refers to...
Men generally live shorter lives than women due to several biological factors. One possible explanation is related to genetic predisposition. Men have a Y chromosome, which is...
