2.3 Cell Organisation In The Human Body
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2.3 CELL ORGANISATION IN THE HUMAN BODY
CELL ORGANISATION 1. 2. 3. 4. 5. 6.
A multicellular organisms has many different types of cells. The different types of cells have different shapes and structures and carry out different functions. We say that the cells are specialized. A group of cells with the same structure and function form a tissue. A group of different types of tissues working together to perform a certain function from an organ. A group of organs working together to perform a certain function form a system. The different systems will form a complete organisms.
TYPES OF HUMAN CELLS, TISSUES AND ORGANS 1. Allow movement of the body. 2. Muscle is made up of bundles of muscle cells that contract (gets shorter) and relax (goes back to its original position) to produce movement.
1. 2. 3.
Covers internal and external surfaces of the body. Barrier against disease. Protects tissues and organs.
1. 2.
Send electrical messages throughout the body. Nerve cells have many fine thread-like structures on their surface. These are used to make connections with other nerve cells to pass electrical message.
1.
Support.
1. 2.
Carries oxygen to all the cells in the body. These cells are shaped like discs and do not have nucleus.
1. 2.
Destroys bacteria and viruses. White bloods cells can change shape. They can move and surround, then destroy the bacteria and viruses.
1. 2.
Produce offspring. It consists of the sperm (from the male) and ovum (from the female).
SYSTEM IN THE HUMAN BODY 1. Two or more different tissues group together to carry out a function. These groups are known as organs. 2. The heart, the lung, the brain and the stomach are examples of organs. 3. A system consists of a group of organs. 4. These organs work together to carry out the same function.
CIRCULATORY SYSTEM 1. Carries oxygen and food to the cells of the body. 2. Carries away waste products from the cells of the body.
DIGESTIVE SYSTEM 1. Breaks down food into smaller components that are absorbed and used by cells.
EXCRETORY SYSTEM
1. 2. 3.
Removes waste products from the body. Lungs remove carbon dioxide and water vapour. Skin and kidneys remove water, urea and mineral salts.
MUSCULAR SYSTEM
1.
For movement.
NERVOUS SYSTEM
1. 2.
Coordination of all the activities in the body. Response to stimuli.
REPRODUCTIVE SYSTEM
1. 2.
For reproduction. The reproductive systems produces reproductive cells (sperm and ovum) and forms new individual.
RESPIRATORY SYSTEM
1. 2.
To supply oxygen to the body. To remove carbon dioxide excreted by all cells.
SKELETAL SYSTEM 1. To provide support for the body. 2. To maintain the shape of the body. 3. For movement. 4. To protect internal organs.
CELL ORGANISATION 1. 2. 3. 4. 5. 6.
A multicellular organisms has many different types of cells. The different types of cells have different shapes and structures and carry out different functions. We say that the cells are specialized. A group of cells with the same structure and function form a tissue. A group of different types of tissues working together to perform a certain function from an organ. A group of organs working together to perform a certain function form a system. The different systems will form a complete organisms.
TYPES OF HUMAN CELLS, TISSUES AND ORGANS 1. Allow movement of the body. 2. Muscle is made up of bundles of muscle cells that contract (gets shorter) and relax (goes back to its original position) to produce movement.
1. 2. 3.
Covers internal and external surfaces of the body. Barrier against disease. Protects tissues and organs.
1. 2.
Send electrical messages throughout the body. Nerve cells have many fine thread-like structures on their surface. These are used to make connections with other nerve cells to pass electrical message.
1.
Support.
1. 2.
Carries oxygen to all the cells in the body. These cells are shaped like discs and do not have nucleus.
1. 2.
Destroys bacteria and viruses. White bloods cells can change shape. They can move and surround, then destroy the bacteria and viruses.
1. 2.
Produce offspring. It consists of the sperm (from the male) and ovum (from the female).
SYSTEM IN THE HUMAN BODY 1. Two or more different tissues group together to carry out a function. These groups are known as organs. 2. The heart, the lung, the brain and the stomach are examples of organs. 3. A system consists of a group of organs. 4. These organs work together to carry out the same function.
CIRCULATORY SYSTEM 1. Carries oxygen and food to the cells of the body. 2. Carries away waste products from the cells of the body.
DIGESTIVE SYSTEM 1. Breaks down food into smaller components that are absorbed and used by cells.
EXCRETORY SYSTEM
1. 2. 3.
Removes waste products from the body. Lungs remove carbon dioxide and water vapour. Skin and kidneys remove water, urea and mineral salts.
MUSCULAR SYSTEM
1.
For movement.
NERVOUS SYSTEM
1. 2.
Coordination of all the activities in the body. Response to stimuli.
REPRODUCTIVE SYSTEM
1. 2.
For reproduction. The reproductive systems produces reproductive cells (sperm and ovum) and forms new individual.
RESPIRATORY SYSTEM
1. 2.
To supply oxygen to the body. To remove carbon dioxide excreted by all cells.
SKELETAL SYSTEM 1. To provide support for the body. 2. To maintain the shape of the body. 3. For movement. 4. To protect internal organs.
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