An organ is a team of various tissues that work-related together to carry out a certain job.

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Organs space grouped together right into organ systems.

Examples of body organ systems inbetterworld2016.orgrporate the circulatory system and also the cradle system.

Layers of organisation

The human being body is made up of many cells, so the is an example of a multicellular organism. A multicellular organism has five layers the organisation, called a hierarchy. below they space in bespeak of betterworld2016.orgmplexity:

Organelles - tiny frameworks which carry out various features within a cell.Cells - the basic unit of every living organisms.Tissues - groups of betterworld2016.orgmparable cells that work together to execute a certain function. Because that example, brain tissue, muscle tissue and heart tissue.Organs - various tissues working together to lug out a particular function.Organ system - a team of guts that job-related together to execute a job.


In an organ, various tissues work-related together to bring out a particular function. These room the main organs, and also their main function:

The brain betterworld2016.orgntrols thoughts, memory and other organs. The heart pumps blood approximately the body. The lungs separate oxygen indigenous the air and remove carbon dioxide indigenous the blood.The stomach help to digest food.The intestines absorb nutrients from food.The liver clears poisons indigenous the blood.The kidneys filter blood and produce urine.The bladder stores urine.The skin protects and also betterworld2016.orgntains the various other organs.

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Organ systems

Organs space organised right into organ systems. An organ system is a team of offal that occupational together to do a job.

Key human organ systems:

The circulatory system includes the heart, veins and also arteries. Its duty is to carry substances in the blood, around the body. The respiratory system betterworld2016.orgntains the nose and the lungs. It takes in oxygen and also removes carbon dioxide. The digestive system betterworld2016.orgnsists of the stomach and intestines. It breaks under food and also absorbs nutrients.The reproductive system includes the uterus and vagina in women, and the penis and also testes in men. Its role is to create offspring. The musculoskeletal system has bones and also muscles. It support the body and allows movement. The immune system betterworld2016.orgntains bone marrow. That protects the human body from infection.