How many cells in an adult human?
Over 50 trillion

What are the only cells without a nucleus?
Red blood cells

What are the longest cells in the body?
Nerve Cells

What is the longest, strongest bone in the body?
Femur

Where is 99% of the body’s calcium?

Bones and teeth

What is the hardest material in the body?
Enamel

What is the body’s largest joint?
Knee

What is the body’s largest muscle?
Gluteus maximus

How many new white blood cells are made every day?

10 Billion

What does trabeculae mean?
Little Beams

How many bones in the skull?

22

Does the human neck have the same number of vertebrae as a giraffe?

Yes

Approximately how much of your body weight is muscle?
40%

How fast can nerve impulses travel?
Up to 250 mph

Approximately how many scalp hairs fall out daily?
80

T or F: The outer surface of each hair is coated with dead cells to protect the hair?
True

What is the longest nerve in the body?
Sciatic

Nerves that interweave together are referred to as:
Plexus

What does the left side of the brain control?
Logic and speech

What does the right side of the brain control?
Creative thinking

How many brain cells can one brain cell communicate with?
25,000

What does vagus mean (as in vagus nerve)?
The wanderer

How long is the spinal cord in most adults?
17 inches

How much skin does the body shed in an average lifetime?
40 lbs

How many taste buds are there on your tongue?
Over 10,000

How many odors can the sense of smell detect?
2,000 – 4,000

How many different tones can you detect?
1,500

How many times do you blink in a minute?
15 times

How many miles of blood vessels does the human body have?
93,000

How many gallons of blood does the heart pump a day?

3,600 gallons

What is the largest artery in the body?

Aorta

Do the atria and ventricles of the heart hold the same volume of blood?
Yes

Another name for a red blood cell is?
Erythrocyte

Another name for a white blood cell is?
Leucocyte

What are the four main blood groups?

A
B
AB
O

What does a macrophage mean?
Big Eater

What is the super human hormone?
Epinephrine

What gland is often referred to as the Master Gland?
Pituitary

What is a hiccup?

The diaphragm contracting rapidly

How much air can adult lungs hold?
About 3 liters

What are the 12 pairs of nerves attached to the brain?
Cranial nerves

What is a protein that speeds up a chemical reaction?
Enzyme

What is the soft inner part of long bones, where blood cells are made called?

Marrow

Where do oxidative energy producing chemical reactions take place?

Mitochondrion

T or F: The average foot walks more than a thousand miles a year.
True

What percent of your body is water?
60%

How long does it take for blood to circulate through the body?
23 seconds

What is the longest muscle in the body?

Sartorius

How many years does it take the cell structure of the skeleton to completely rejuvenate itself?
10 years

What is the only joint of the body with 360 degrees of rotation?
Shoulder

What is the single most preventable cause of death?
Cigarette smoking

Is it better to go to bed at the same time nightly or wake up at the same time each morning?
Most experts recommend getting up at the same time each morning.

What is the single most important thing you can do to prevent the transmission of infectious organisms?
Wash your hands.