MEDICAL PROBLEMS [PAGE 2 of 4 CONTINUED]
Legs: A human has only two legs and all body weight is on these two legs. Therefore many times people have lots of problems in legs. Heavy people usually suffer because these legs cannot take the weight. It is always advised by the doctors to loose weight.
Feets features five
long bones, which extend between the tarsal of the ankle and the phalanges
(toe bones). The metatarsals are numbered beginning with that of the large
toe (#1). The head (distal end) of each metatarsal bone is bulbous at
the site of articulation with the phalanges, and features small projections
or knobs to which the ligaments of the toes and foot attach.
Hands: Human is the only animal in the world has two hands with ten fingers and is so flexible. The maximum bones in human body are in the hands and legs. A person can eat, pick up things, do all kind of work other animals cannot do.
The bones of the fingers (and toes) are known as phalanges (singular: phalanx). Each finger has three phalanges, with the exception of the thumb, which has only two. The phalanges are referred to by their position with respect to the body when the hand is extended. The joints at the ends of the fingers, because they are the most distant from the body, are the distal phalanges. The next are the middle phalanges (which the thumb does not have). Those articulating with the metacarpals of the hand are the proximal phalanges. The ends of each phalanx are somewhat bulbous at the site of articulation with other bones. These prominences also serve as sites of attachment for phalangeal ligaments.
According to scientists, Heart, in anatomy, hollow muscular organ that pumps blood through the body. The heart, blood, and blood vessels make up the circulatory system, which is responsible for distributing oxygen and nutrients to the body and carrying away carbon dioxide and other waste products. The heart is the circulatory system’s power supply. It must beat ceaselessly because the body’s tissues—especially the brain and the heart itself—depend on a constant supply of oxygen and nutrients delivered by the flowing blood. If the heart stops pumping blood for more than a few minutes, death will result.
The heart is a hollow pear-shaped muscular organ placed between the lungs in the middle of the chest that pumps blood through the body, supplying cells with oxygen and nutrients. It is attached to the breastbone by special connective tissues called ligaments. The apex (blunt point of the lower edge of the heart) lies on the diaphragm, pointing toward the left. The apex pulses with every beat of the heart. This is what you feel when you hold your hand to your heart. The heart has four cavities: a small upper cavity (atrium) and a large lower cavity (ventricle) on each side. The adult human heart is approximately the size of a fist. In an average adult, it is about five inches long and three and a half inches across at its broadest part, and it weighs less than a pound.
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