Quiz - Human Body Organs

Your heart pumps blood to every living cell throughout your body. When your heart beats, it pumps blood through the lungs. In the lungs, your blood gives off carbon dioxide and takes in oxygen. Oxygen rich blood travels through ARTERIES to the bodies cells. VEINS carry "used" blood, full of carbon dioxide and waste back to the heart. CAPPILARIES are the VERY small blood vessels that connect arteries and veins.

The brain controls all the other organs in the body. Some body functions, like food digestion, occur automatically. You can't, for example, tell your heart to stop beating. Other functions, like walking and talking are controlled by you through the brain. Your brain is connected to other parts of the body by nerves. If you tickle your feet, that sensation is transmitted to the brain through nerves.

There are 3 types of muscles:

1) Cardiac muscles are the muscles in your HEART.

2) Your stomach and esophagus have smooth muscles. Your brain controls your smooth muscles automatically.

3) Skeletal muscles are muscles connected to your bones. When you pick up a book, you are controlling your skeletal muscles.

Ovaries are female reproductive organs. Females have two walnut shaped organs that are INSIDE the body. After puberty, ovaries produce one egg about every 28 days.

Testicles are male reproductive organs. Males have two testicles. They are walnut-shaped organs that are OUTSIDE of the body. After puberty, testicles produce sperm.

Most of the organs in the human body are basically the same in males and females. A man can receive a heart transplant from a woman. Reproductive organs, however, are different in males and females. Reproductive organs are use to reproduce - make babies. After birth, female breasts produce milk to nourish the newborn baby. Male breast, in general, never produce milk.

Your skin is the largest organ in the human body. It covers and protects the organs of the body and can self-repair if damaged. Skin has multiple layers. The outermost layer is called the epidermis.

Your sensory organs allow you to sense the world around you. They allow you to see, hear, taste, smell, and feel.

Your skeleton provides structural support for your body. Most vertebrates (mammals, reptiles, amphibians, fish, and birds) have endo skeletons - the skeleton is on the inside of the body. Creatures like crabs, lobsters, and beetles have skeletons on the outside of the body - exo-skeletons.

Your lungs are where respiration takes place. Air in your lungs is absorbed into your blood in tiny air sacs called alveoli. Carbon dioxide in your "used" blood is released into the lungs.

Why we have an appendix is kind of a fuzzy issue. Some scientists now think that it's a repository for "good" bacteria. What we do know is that appendices can become infected. If they become infected, they must be surgically removed or they can rupture. If they rupture, the infection spreads throughout the body and can kill you. People who've had their appendix removed can live normal, healthy lives without it. So...do you really need an appendix? No.

Your two kidneys filter waste out of blood. The liquid waste travels through you ureters into the bladder. When your bladder fills, you need to urinate (pee). The urethra is the tube that leads from the bladder to the outside. Girls have a shorter urethra than boys, so they need to take care to avoid bladder infections.

esophagus = food tube
trachea = air tube
heart = blood pump
kidneys = blood filter

Kidneys filter liquid waste out of the blood. You have two kidneys and can live with just one. Liquid waste (urine) from the kidneys travels through ureters to the bladder, where it's stored until you urinate (pee).

The first phase of digestion happens in the mouth. Your teeth break up food and saliva starts to break down starches. The second phase happens in the stomach. Acids in your food break down food and your stomach muscles squeeze and churn the food.

Nutrients are absorbed into the blood in the small intestine. The small intestine is lined with little projections called villi which have micro-villi on them. The villi are filled with blood.

ovaries = female reproductive organs that, after puberty, produces one egg about every 28 days
testicles = male reproductive organs that, after puberty, produce sperm
alveoli = air sacs that absorb oxygen into the blood and release carbon dioxide from the blood
villi = hair-like projections inside the small intestine that absorb nutrients directly into out blood.

The pancreas is a small organ that produces enzymes that help dissolve food into nutrients.

Nutrients are absorbed in the small intestine. Excess water is absorbed in the LARGE INTESTINE.

The liver is part of the digestive system, but it also performs other functions. The liver produces bile, which is stored the gall bladder. Bile gets squirted on food in the duodenum to help turn food into nutrients. The liver also helps to DETOXIFY blood. After the skin, the liver is the second largest organ in the body.