Tokyo is the largest city in the world, hosting over 36 million people spread over 3 prefectures (districts). It is the capital-city of Japan and is officially known as the Tokyo Metropolis. Tokyo was formerly known as Edo in the 20th century. Tokyo is made up of 23 wards and 62 municipalities. There are more […]
The strongest muscle is located in thejaw. It is called the Masseter. It can close the teeth with a force of 25 kilograms on the incisors or 90 kilograms on the molars. We have two jaw muscles that are used for chewing and one of them is the Masseter Muscle. The Masseter Muscle is thick
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The longest, largest and hardest bone in the human body is the Thigh Bone. It is also known as Femur. It is located between the knee and the hip. It has the knee cap at the bottom and pelvis at the top. This bone makes up about one-fourth of a person’s height. It allows us
The largest and longest vein in the human body goes from the foot up the leg to the hip. It is called the Great Saphenous Vein or the Long Saphenous Vein. The purpose of this great vein is the delivery of blood from the ankle, lower leg and the thigh to the vein in the
Adam’s Apple sometimes looks like a small, rounded apple just under the skin in the front of the throat. Both man and woman have it. It is called Adam’s Apple because of the story of the Garden of Eden where Adam ate a piece of the forbidden fruit that got stuck in his throat. Adam’s
The smallest and lightest bone in the human body is the Stapes. It is located in the middle ear. The Stapes is one of the three small bones. These bones are collectively called the ossicles. The Stapes Bone is also known as the ‘Stirrup Bone’ because it is shaped like a stirrup. The Stapes is
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The Rib cage is made up of long and curved bones. Ribs make a protective cage around the lungs, the liver and the heart. There are usually 12 pairs of ribs, each pair attached to the spine at the back. At the front of the body, the top 7 ribs are attached to the breast
Hiccups start at the diaphragm. The diaphragm is a dome-shaped muscle at the bottom of the chest. When we inhale, the diaphragm pulls down to help the air into the lungs. When we exhale, the diaphragm relaxes and air flows out of the lungs. Sometimes, the diaphragm becomes irritated. When this happens, it pulls down
The Windpipe is a wide and hollow tube in the throat that connects the mouth and the nose to the lungs. It is also called trachea. It is an integral part of the body’s airway as it provides air flow to and from the lungs for respiration by transporting air through the nose or mouth
Gallbladder is a small blue-coloured organ. This pear-shaped organ is hidden underneath the liver. Gallbladder is very important for proper functioning of the digestive system. The main objective of the gallbladder is to store the bile juice which is secreted by the liver. The organ has a sac-like structure which is divided into three segments:
Bone Marrow is a thick, spongy kind of jelly inside the bones. Bone Marrow makes red blood cells that carry oxygen, white blood cells that fight infections, and platelets that help blood clot. Bone Marrow is found in the flat bones such as the hip, breast, skull, ribs, vertebrae and shoulder blades. It is also
Tears are produced by tear glands which are small glands inside the eyelid. Tears keep the surface of eyeball clean and moist. They help to protect the eye from damage. The eyelids spread the tears over the surface of the eye. Tears flow down a tiny tube at the edge of lower eyelid, next to
Nails are made in folds of the skin near the ends of fingers and toes. They start growing in the nail root. Then, they slide out over the nail bed towards the end of toes and fingers. Near the end of the nail, it separates from the skin underneath it, where the nail colour changes
Hair grows at the hair root, a place beneath the skin where cells band together to form keratin. Keratin is the protein that hair is made of. The root is inside a follicle which is like a small tube in the skin. As the hair grows, it pushes up from the root and out of
Blood contains Red Blood Cells, White Blood Cells and Platelets. Red Blood Cells develop in bone marrow. They contain a protein called Haemoglobin which combines with oxygen to give blood–a red colour. Red Blood Cells circulate for around 120 days. They carry oxygen around the body and remove carbon dioxide from the body. The shape