Organization And Structure Of The Body
Organization And Structure Of The Body
All living things are made up of one or more cells. For this reason, cells are known as the structural units or the building blocks of life.
In an organism made up of only one cell (unicellular), the single cell performs all the activities necessary for life. In an organism made up of many cells (multicellular), the various life activities are performed by different groups of cell.
Organization of body :-
Cell :-
Cell is the smallest structural and functional unit of an organism. It is the building block of a living organism. It is a membrane bound and is made up of cytoplasm, genetic material and other cell organelles.
Tissue :
A group of cells that performs a special job together is known as a tissue. Blood, bone, muscle and skin are some of the tissues in your body. For example, muscle tissues are a group of cells, specialized to contract and expand for the movement of body parts.
Organ :
Tissues combine to form an organ. Each organ performs some important function of the body. For example, the heart is an organ that pumps blood to various parts of the body. The eye is an organ that enables you to see. Lungs, kidneys and liver are some other organs which perform important roles in your body.
Organ system :
Groups of organs work together to carry out various life activities in our body. For example the food pipe, stomach, small intestine, large intestine and some other organs together help you to digest the food you eat. Such a group of organs is called an organ system. The group of organs that carry out digestion of food collectively form the digestive system. Some other systems in your body are: circulatory, respiratory, nervous, urinary (or excretory), reproductive, muscular and skeletal system .
The main systems in the human body and their functions are given:
| ORGAN SYSTEM | MAIN ORGANS | MAIN FUNCTIONS |
| Skeletal system | bones | gives support to the body; protects internal organs; allow movement |
| Muscular system | muscles | movement of body parts |
| Circulatory system | heart, blood, blood vessels | transport nutrients and oxygen to all parts of body; transports waste |
| Nervous system | brain, spinal cord, nerves | controls all functions of the body |
| Respiratory system | nose, wind pipe, lungs | takes in oxygen and remove carbon dioxide gas |
| Digestive system | teeth, food pipe, stomach, small intestine, large intestine | Digest and absorb nutrients necessary for growth and maintainance of the body |
| Excretory system | kidneys,ureters,bladder, urethra, skin | removes waste from the body |
| Reproductive system | female : ovaries, oviducts, uterus, penis | produces offsprings |
All these systems together form your body. They all work to keep you alive. Thus, the human body, and the bodies of all multiceliular living organisms, are organized as follows:
Which of the following are correct : (a) Cell is the smallest structural and functional unit of an organism. (b) A group of cells that performs a special job together is known as a tissue. | |||
| Right Option : C | |||
| View Explanation | |||
Which of the following are correct : (a) Cell is the smallest structural and functional unit of an organism. (b) Blood, bone, muscle and skin are some of the tissues in your body. (c) A group of cells that performs a special job together is known as a tissue. | |||
| Right Option : D | |||
| View Explanation | |||
A group of cells specialized to perform a specific task is known as _____________________ | |||
| Right Option : A | |||
| View Explanation | |||
Students / Parents Reviews [20]
Third consective year,my ward is in Abhyas with nice experience of admin and transport support.Educational standard of the institute recumbent at satisfactory level. One thing would live to bring in notice that last year study books was distributed after half of the session was over,though study ...
Ayan Ghosh
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Om Umang
10thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
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Barkha Arora
10thWe started with lot of hope that Abhyas will help in better understnding of complex topics of highers classes. we are not disappointed with the progress our child has made after attending Abhyas. Though need to mention that we expected a lot more. On a scale of 1-10, we would give may be 7.
Manya
8thMy experience with Abhyas academy is very nice or it can be said wonderful. I have been studying here from seven class. I have been completing my journey of three years. I am tinking that I should join Abhyas Academy in tenth class as I am seeing much improvement in Maths and English
Hridey Preet
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Anika Saxena
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Ayan Ghosh
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Yogansh Nyasi
7thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
Aman Kumar Shrivastava
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Aman Kumar Shrivastava
10thAbhyas institute is one of the best coaching institute in the vicinity of Ambala cantt.The institute provides good and quality education to the students.The teachers are well experienced and are very helpful in solving the problems. The major advantages of the institute is extra classes for weak...
Shreya Shrivastava
8thIn terms of methodology I want to say that institute provides expert guidence and results oriented monitering supplements by requsite study material along with regular tests which help the students to improve their education skills.The techniques of providing education helps the students to asses...
