Important Facts about Human Anatomy

Important Facts about Human Anatomy :

Longest bone in human body -- Femur (thigh bone)
Smallest bone - STAPES (Middle ear)
Hardest material in the human body Tooth.                   -- enamel
Strongest muscle -- Jaw muscle
Largest external organ -- Skin
Largest internal organ -- Liver
Smallest gland -- Pituitary
Largest artery -- Aorta
Smallest blood vessel -- Capillary
Element most common in human body -- Oxygen(65%)
Mineral most common in human body -- Calcium
Compound most common in human body -- Water
Pigment which gives a dark colour to the skin-- Melanin
Nails are modification of EPIDERMIS (externallayer of skin)
Muscles are attached to bones by connective tissues called --Tendons
Bones are attached to bones by -- Ligaments
Sebaceous glands in human body secrete -- Sebum or oil
Lachrymal glands in human body secrete   --  Tears
The volume of blood in an adult is -- 4.7 to 5 litres
The total number of bones in human body is -- 206
The most common type of blood group is -- Type O+