11 organ systems of the human body
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The human body is the entire structure of a humanorganism, and consists of a head, neck, torso, two arms and two legs. By the time the human reaches adulthood, the body consists of close to 100 trillioncells, the basic unit of life. These cells are organised biologically to eventually form the whole body.
Size, type and proportion
The average height of an adult male human (in developed countries) is about 1.7â€“1.8 m (5'7" to 5'11") tall and the adult female about 1.6â€“1.7 m (5'2" to 5'7") tall. This size is firstly determined by genes and secondly by diet. Body type and body composition are influenced by postnatal factors such as diet and exercise.
The organ systems of the body include the musculoskeletal system, cardiovascular system, digestive system, endocrine system, integumentary system, urinary system, lymphatic system, immune system, respiratory system, nervous system and reproductive system.
The cardiovascular system comprises the heart, veins, arteries and capillaries. The primary function of the heart is to circulate the blood, and through the blood, oxygen and vital minerals to the tissues and organs that comprise the body. The left side of the main organ (left ventricle and left atrium) is responsible for pumping blood to all parts of the body, while the right side (right ventricle and right atrium) pumps only to the lungs for re-oxygenation of the blood. The heart itself is divided into three layers called the endocardium, myocardium and epicardium, which vary in thickness and function.
The digestive system provides the body's means of processing food and transforming nutrients into energy. The digestive system consists of the - buccal cavity, esophagus, stomach, small intestine, large intestine ending in the rectum and anus. These parts together are called the alimentary canal (digestive tract).
The integumentary system is the largest organ system in the human body, and is responsible for protecting the body from most physical and environmental factors. The largest organ in the body, is the skin. The integument also includes appendages, primarily the sweat and sebaceous glands, hair, nails and arrectores pili (tiny muscles at the root of each hair that cause goose bumps).
The main function of the lymphatic system is to extract, transport and metabolise lymph, the fluid found in between cells. The lymphatic system is very similar to the circulatory system in terms of both its structure and its most basic function (to carry a body fluid).
An adult human has approximately 206 distinct bones:
- Spine and vertebral column (26)
- Cranium (8)
- Face (14)
- Hyoid bone, sternum and ribs (26)
- Upper extremities (70)
- Lower extremities (62)
The nervous system consists of cells that communicate information about an organism's surroundings and itself.
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Answers:It's a lot better for you to search for the answer to your question to learn more about the subject. http://www.contmediausa.com/shop/app/products/Human3D/human3dhumanbodyorgans.html Good luck.
Answers:circulatory respiratory digestive skeletal nervous endocrine lymphatic muscular urinary integumentary reproductive The Immune and Lymphatic Systems do have similarities, but they are not the same thing. The Immune System only includes the lymphocytes. The Lymphatic System includes the tonsils, the thymus gland, the liver, the spleen, the lymph nodes, and the lymphatic vessels. Some people do consider the whole Urinary System as part of the Excretory System, but the Excretory System does not get rid of only urine. It also gets rid of sweat, carbon dioxide, water vapor, bile, and feces, using the organs that I listed above of the Excretory System. you actually could have just googled that.
Answers:This is a difficult question to ask. However, i would go for a simple solution. Think about eating food (ingestion, digestion, absorbtion and elimination). You pick up food, say an apple, and your brain sends signals through neurons that connects to the muscles and the muscles then contract lifting the skeletal structure of the arm, allowing the apple to be placed between the teeth. Muscles in the jaw then chew and grind the apple piece and it is swallowed down the esophagus by the process of perestalsis which involves nervous system control. It then reaches the stomach which contracts and churns mixing food stuff with gastric juices. It reaches the small intestine eventually and absorption of nutrients - this requires a huge demand of blood (controlled delivery to the small intestine of this blood happens thanks to sphincters and the circulatory system. (bearing in mind that all the actions above required involvement of the circulatory system). This is a simplistic overview but i think the example gives a good general involvement of all systems at work Hope this helps.
Answers:integumentary ---- skin & derivative muscular ---- muscle skeletal ---- bones/joints nervous ---- brain/spinal cord endocrine ---- glands lymphatic & immune ---- lyphatic stuff cardiovascular ---- blood/heart respiratory ---- lungs/airways digestive ---- gastrointestinal tract urinary ---- kidney/bladder reproductive ----gonads & associated organs