ILHAM HASSAN-SLIDE SET-UNIT 1.2-DIGESTIVE SYSTEM

  [UNIT-1.1]          DIGESTION  

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Caption: : DIGESTION DIAGRAM

• CELLS REVISION
• DIGESTIVE SYSTEM CONTINUATION
• CIRCULATION QUIZ-ILHAM

THE NEED FOR BODY SYSTEMS

In your body there are different levels of organisation. Cells come in may types, such as skin cells and muscle cells. Cells of the same job in the body are grouped together to form tissues, such as muscles and nerves. At the next level of organisation, tissues are grouped to form organs, such as the stomach or brain. An organ is a structure that contains at least two different types of tissue that work together to complete a task. Organs are arranged into organ systems that have 2 or more different organs that work together. digestive system makes food available in a form the body can use  the respiratory system takes in oxygen circulatory system carries food and oxygen to where it is needed  excretory system gets rid of the wastes skeletal system supports the body and enables it to move

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Caption: : DIFFERENT TYPES OF BODY SYSTEMS-DIAGRAM

THE DIGESTIVE SYSTEM

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Caption: : The burger looks good and probably tastes good , but it has to be digested before you can use the nutrients it contains.

Digestion is the process of breaking down food into a usable form and making the nutrients available.Digestion takes place in your digestive system . Your digestive system consists of :a digestive tract, the pathway that the food takes through a series of organs. The first part of the digestive tract is the mouth.organs off to the side of the digestive tract that produce chemicals that assist with digestion.

TYPES OF DIGESTION

There are two different types of digestion mechanical digestion and chemical digestion.  Mechanical digestion is when the food is broken down into smaller pieces. Mechanical digestion is a physical change because no new substances are made. Mechanical digestion happens when you tear and chew food with your teeth.In chemical digestion the large, complex substances in the food are broken down into simpler chemicals. This produces new, smaller chemicals that the body can absorb. Chemical digestion is a chemical change because new substances are produced. Chemical digestion happens when saliva in your mouth and gastric juice in your stomach break down your food.

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Caption: : MECHANICAL & CHEMICAL DIGESTION