Taking Care of Hashem’s Children Bnei Melachim Provides Much-Needed Support for Widows and Orphans

Past Articles:
HUMAN ANATOMY

By: Professor Noe Ital [aka: Know-it-all]



How does a cast work
to help a broken bone?

If you break a bone, it can mend itself.
It will make a new bone at the place where it was broken. The bone needs to be kept still while this happens, so it may be set in a plaster cast. However, if the bone is badly broken, it may need an operation
to put in metal screws and pins to hold
it together.

Why do my hands and feet get wrinkled
when they’re in water for a long time?

The skin’s outermost layer, the epidermis, is responsible for
your wrinkled skin.

The epidermis contains a protein called keratin, which strengthens your skin and helps keep it moist. Dead keratin cells make up the epidermis’s surface layer. The dead keratin cells absorb water easily and start to swell after extended periods in the water, but the living keratin cells, which are deeper in the skin, do not. As the dead cell layer expands, it begins to take up more surface area, but because it’s still connected to the living cells beneath, this surface layer doesn’t have anywhere to go. So it swells outward in some places and pinches inward in other places, which makes wrinkles.

The layer of skin that swells and wrinkles is thicker on the palms of your hands and the bottoms of your feet than it is on other body parts. That’s why the skin on your palms wrinkles more than, for example, the skin on the back of your hand.

What is heartburn?

Despite its name, heartburn has nothing to do with the heart. Heartburn is an irritation of the esophagus that is caused by stomach acid. You may have experienced the burning sensation of heartburn after eating spicy foods or after eating a large meal. The pain often rises in your chest and may spread to your neck or throat.

Heartburn is usually associated with the regurgitation (bringing up from the stomach) of gastric acid, called reflux. This occurs when the muscle that connects the esophagus with the stomach relaxes at the wrong time or doesn’t close properly. Normally, this muscle opens to allow food into the stomach or to permit burping; then it closes again. But if this muscle opens too often, or does not close tightly enough, stomach acid seeps backward into the esophagus. This reflux is what causes the burning sensation known as heartburn.

QUESTION OF THE MONTH:

This month’s question was submitted by Jessica of Brooklyn, NY.

Dear Professor, How much blood is in the human body?

An adult body holds 9 to 10 pints of blood. It travels about 12,000 miles around the body every day!