Do you know how human organs work?

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The trachea, bronchi and alveoli are parts of which human organ system?

The trachea, bronchi and alveoli are all parts of the respiratory system.

Which muscular female organ can stretch to the size of a watermelon?

The uterus is a muscular female organ located in the pelvis. It has a pre-pregnancy size of a pear, but during pregnancy it can stretch to the size of a watermelon.

Which organ is responsible for secreting insulin into the bloodstream?

The pancreas creates and releases insulin into the bloodstream.

What is the largest organ of the human body?

The skin is classified as an organ and is the largest organ of the human body. The skin of an average person weighs about 10 pounds and has a surface area of roughly 20 square feet.

Which sensory organ contains three semicircular canals that assist with balance by detecting movement of the head?

The fluid-filled semicircular canals are located in the inner ear and contain hair cells that are activated by movement of fluid within each canal.

Kidneys are part of which organ system?

As part of the urinary system, kidneys filter blood, balance electrolytes and produce urine.

Which human organ is responsible for production of eggs?

Ovaries are a pair of small organs in the female pelvic cavity that produce eggs. Each ovary is roughly the size and shape of an almond.

Which organ controls the "fight or flight" response?

The adrenal glands produce hormones that trigger the "fight or flight" response. These hormones -- adrenaline and noradrenaline -- increase blood pressure, heart rate and oxygen intake and prepare the body for action.

Which human organ system includes ganglia and neurons?

The nervous system includes ganglia and neurons and responds to internal as well as external stimuli.

The organ that regulates metabolism, growth and maturation of the human body is called what?

The thyroid gland regulates metabolism, growth and maturation of the human body.

Which organ stores liquid waste in the human body?

The bladder is a muscular organ that stores urine before expelling it through the urethra.

Which organ filters blood as it circulates through the human body?

In addition to filtering blood, the liver produces cholesterol and important proteins like albumin.

Which organ stores bile until it is needed for digestion?

The gall bladder is located under the right lobe of the liver and stores bile for digestion. Bile is a yellow-brown fluid that is excreted into the small intestine to break down fatty foods.

Humans can live without a spleen.

While the spleen does function to filter blood and manage the immune system, humans can live without it. Other organs, such as the liver and lymph nodes, take over the functions of a spleen when it is removed.

Which sensory system contains an organ called the cochlea?

The cochlea is a fluid-filled organ that translates sound into nerve impulses which are sent to the brain. Humans have two cochlea. They are snail-shaped caverns in the mastoid bones behind each ear.

The human small intestine is the longest part of the digestive system.

At a length of approximately 22 feet, the small intestine is indeed the longest part of the digestive system.

Rod and cone cells are a crucial part of which sensory organ?

Rod and cone cells are the two photoreceptors of the human eye. Rods are most sensitive to light and dark, shapes and movement. Cones are sensitive to color and fine detail.

What is the smallest organ in the human body?

The pineal gland is the smallest human organ and it is located near the center of the brain. The pineal gland produces a hormone called melatonin, which affects how humans sleep.

How many chambers does the human heart use to pump blood?

The human heart uses four chambers to circulate blood through the body: the left atrium, right atrium, left ventricle and right ventricle.

How many layers does the integumentary system have?

The integumentary system, commonly known as skin, is made up of three main layers: the epidermis, dermis and the hypodermis.

Which organ is approximately 73 percent water and weighs about three pounds?

The human brain weighs an average of three pounds and is approximately 73 percent water. Brain attention, memory and other cognitive skills are affected by as little as a 2 percent drop in hydration.

Which human organ is responsible for extracting moisture from and then excreting residual food particles?

The large intestine begins at the cecum and ends at the rectum. The large intestine extracts moisture from food particles and excretes the unusable waste.

The organ that breaks down old or damaged red blood cells is called?

The spleen filters out old and damaged red blood cells. The spleen can recycle useful components, such as iron, when the red cells are broken down.

Which organ system sends chemical messages through the bloodstream to target specific organs?

The endocrine system is made up of glands and secretes hormones to regulate a number of body functions.

Which bean-shaped organ is located between the esophagus and small intestine?

The stomach is a bean-shaped organ about the size of a fist. Food is swallowed through the esophagus and churned by the stomach before passing on to the small intestine.

A group of tissues that perform a specific function or set of functions is called?

An organ is defined as a group of tissues that perform a specific function or group of functions.

What is the term for being born with only one kidney?

Renal agenesis is a condition in which a person is missing a kidney at birth. Most people with renal agenesis experience no symptoms or complications.

The duodenum, jejunum and ileum are parts of which organ?

The small intestine contains the duodenum, jejunum and ileum. The primary functions of the small intestine are to digest food and absorb nutrients.

Which lung is larger?

The right lung is larger and heavier than the left. The left lung is smaller because of the position of the heart.

Oxygen and carbon monoxide gas exchange takes place in the lungs.

Carbon dioxide (not monoxide) and oxygen are exchanged in the lungs. Oxygen is inhaled into the lungs and carbon dioxide is exhaled.

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About This Quiz

Are you an amateur anatomy buff, medical student, or doctor? Do you have the guts to find out? Take this quiz and discover if you know all there is to know about the human organ system!

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