Note on Interrelationship Between Cell, Tissue and Organs in Human Body

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Cell

The cell is the simplest and smallest unit, capable of carrying all the life activities. Each cell is capable of performing the basic functions of life such as respiration, reproduction, excretion, growth etc. All these life processes are performed by their single cell. So, the cell is the structural and functional unit of life. A cell can be defined as the protoplasm surrounded by the cell membrane, which works as structural and functional unit of life.


Tissue

The tissue is defined as a group or layer of similarly specialized cells which together performs certain special functions. Cells combine together inside the body to form a tissue, each of which has a specialized function e.g. blood, muscles bone etc. Blood is a kind of tissue which also consists of many cells and provides transportation inside our bodies and helps in movement.


Organs

Organs are made up of group or layer of tissues. Organs have various functions according of its structure. Some of the organs do multiple functions. For example: Heart pumps the blood and regulates the blood in all body. Kidney purifies water and also regulates water in surrounding.

System

Various organs forms system. There are 9 systems in the human body. Every system has their unique functions. Table of system with its organ and functions in animals is below:

S.N System Organs Main functions
1 Skeletal system
  1. Bones
  2. Joints
To protect internal organs and give rigidity to a body.
2 Muscular system
  1. Muscles
  2. Tendons and ligaments
To control the movements of the body.
3 Digestive system
  1. Mouth
  2. Esophagus
  3. Stomach
  4. Small intestine
  5. Large intestine
  6. Rectum
  7. Anus
  8. Liver
  9. Gallbladder
  10. Pancreas
  11. Appendix
To extract nutrients from food and excrete waste products from the body.
4 Respiratory system
  1. Nose
  2. Larynx and pharynx
  3. Trachea and Bronchi
  4. Lungs
To add oxygen to the blood and remove carbon dioxide from the blood.
5 Circulatory system
  1. Heart
  2. Blood vessels
To pump blood and circulates it throughout the body.
6 Excretory system
  1. Kidneys
  2. Ureters
  3. Bladder
  4. Urethra
To filterwaste products from the blood.
7 Nervous system
  1. Brain
  2. Spinal cord
  3. Nerves
To directs intentional and many automatic actions of the body and enable thinking, self-awareness, and emotions.
8 Reproductive system
  1. Ovaries
  2. Testes
To enable reproduction.
9 Glandular system
  1. Pituitary gland
  2. Thyroid gland
  3. Parathyroid gland
  4. Adrenal gland
  5. Pancreas
  6. gonads
To produce chemical messenger and circulate them through the blood, which direct the activities to the different organ.

Relation between cell, tissue, organ and system in animals

Various types of tissues are grouped together to form an organ which carries out one or more specific activities. In a multicellular organism, several interrelated organs arranged into an organ system. For example: The respiratory system includes organs such as the nose, pharynx, larynx, trachea, lungs etc. They are composed of different types of cells. Likewise, the digestive system includes organs such as mouth, salivary glands, stomach, intestine, liver, gallbladder, pancreas etc. The main function of the digestive system is to take in food and carry out its digestion, absorption, and egestion.

  • The cell is the simplest and smallest unit, capable of carrying all the life activities.
  • Cells combine together inside the body to form a tissue, each of which has a specialized function e.g. blood, muscles bone etc.
  • The tissue is defined as a group or layer of similarly specialized cells which together performs certain special functions.
  • In the multicellular organism, several interrelated organs arranged into an organ system.
.

Very Short Questions

The cell is the simplest and smallest unit, capable of carrying all the life activities. Each cell is capable of performing the basic functions of life such as respiration, reproduction, excretion, growth etc. All these life processes are performed by their single cell. So, the cell is the structural and functional unit of life. A cell can be defined as the protoplasm surrounded by the cell membrane, which works as structural and functional unit of life.

The tissue is defined as a group or layer of similarly specialized cells which together performs certain special functions. Cells combine together inside the body to form a tissue, each of which has a specialized function e.g. blood, muscles bone etc. Blood is a kind of tissue which also consists of many cells and provides transportation inside our bodies and helps in movement.

Organs are made up of group or layer of tissues. Organs have various functions according of its structure. Some of the organ does multiple functions. For example, Heart pumps the blood and regulates the blood in all body. Kidney purifies water and also regulates water in surrounding.

Various types of tissues are grouped together to form an organ which carries out one or more specific activities. In the multicellular organism, several interrelated organs arranged into an organ system. For example: The respiratory system includes organs such as the nose, pharynx, larynx, trachea, lungs etc. They are composed of different types of cells. Likewise, the digestive system includes organs such as mouth, salivary glands, stomach, intestine, liver, gallbladder, pancreas etc. The main function of the digestive system is to take in food and carry out its digestion, absorption and egestion.

There are nine types of system. They are:

  1. skeletal system
  2. muscular system
  3. digestive system
  4. respiratory system
  5. circulatory system
  6. nervous system
  7. excretory system
  8. reproductive system
  9. glandular system

There are six types of glands. They are:

  1. Pituitary gland
  2. Thyroid gland
  3. Parathyroid gland
  4. Adrenal gland
  5. Pancreas
  6. Gonads

The organs involved in digestive system are:

  1. Mouth
  2. Esophagus
  3. Stomach
  4. Small intestine
  5. Large intestine
  6. Rectum
  7. Anus
  8. Liver
  9. Gallbladder
  10. Pancreas
  11. Appendix

The functions of the nervous system are directing intentional and many automatic actions of the body and enable thinking, self-awareness, and emotions.

it provides protein to cell.

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  • Which one of the following is included in glandular system?

    lungs
    spinal cord
    urethra
    parathyroid gland
  • Which one of the following is included in respiratory system?

    urethra
    tendons
    parathyroid gland
    lungs
  • Which one of the following is included in nervous system?

    spinal cord
    tendons
    urethra
    parathyroid gland
  • Which one of the following is included in reproductive system?

    tendons
    parathyroid gland
    ovaries
    spinal cord
  • Which one of the following is included in circulatory system?

    ovaries
    heart
    spinal cord
    parathyroid gland
  • Which one of the following is included in excreatory system?

    heart
    spinal cord
    urethra
    parathyroid gland
  • Which one of the following is included in muscular system?

    heart
    parathyroid gland
    spinal cord
    tendons
  • Which one of the following is included in skeletal system?

    spinal cord
    bones
    heart
    parathyroid gland
  • Which one of the following is included in digestive system?

    parathyroid gland
    food pipe
    heart
    spinal cord
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