2006-12-28 17:29:52 · 6 answers · asked by Ivy 1 in Science & Mathematics ➔ Biology
The human body internal organs systems:
The skeletal system including cartilage, joints and ligaments
The musculature with the skeletal musculature and the heart muscle
The respiratory system with the upper and lower airways
The cardiovascular system with the heart and blood vessels
The lymphatic system with the lymph nodes, spleen and thymus gland
The digestive system with everything from the mouth to the intestine
The endocrine system with the thyroid gland and sexual glands
The nervous system with the brain, nerves and organs of sense
The excretory system with the urinary tract and kidneys
The reproductive system comprising the genital organs and
The reproductive process up to and including birth.
A number of other organs not listed here individually play decisive roles. The most important basic component of all these organs and organ systems is the cell, the smallest unit in the body. Cells can move, reproduce, grow, possess a metabolism of their own and register and convey external stimuli. These characteristics qualify them as living organisms.
2006-12-28 17:38:48 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Organ ????
The length of all blood vessels in a human body reaches about 100,000 kilometers. Tiniest vessels – capillaries – are not more than four micrometers in diameter. The amount of blood in a human organism is not constant, although it does not exceed seven or ten liters. This is definitely not enough to fill all blood vessels. Furthermore, red corpuscles are about seven micrometers in diameter, which makes it hard to imagine how they manage to flow along 4-micrometer capillaries...
i reckon even smaller is DNS/GENE r basic CELL/ATOM/Nucleus.. it all comes down to this..
2006-12-28 17:44:10 · answer #2 · answered by Makubex 2 · 0⤊ 0⤋
The pineal gland is about 8mm (located in brain). Glands are considered organs:
A gland is an organ in an animal's body that synthesizes a substance for secretion.
A differentiated part of the body that performs a specific function.
http://www.answers.com/organ
2006-12-28 18:12:56 · answer #3 · answered by teachbio 5 · 0⤊ 0⤋
What do you mean by "organ"? I'm thinking of a gland, but not sure that is what you mean.
2006-12-28 17:32:17 · answer #4 · answered by Avon Lady 4 · 0⤊ 0⤋
hair folicle?
2006-12-28 17:37:36 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Harry, is that you?
2006-12-28 17:48:44 · answer #6 · answered by Lorenzo Steed 7 · 0⤊ 0⤋