Humans’ body systems

By PresenterMedia.com

HUMAN BODY SYSTEMS

DIGESTIVE SYSTEM

RESPIRATORY SYSTEM

SKELETAL SYSTEM

MUSCULAR SYSTEM

CIRCULATORY SYSTEM

MOVEMENT SYSTEM

Note:In this chapter, we only discuss digestive, respiratory and circulatory systems

DIGESTIVE SYSTEM

DIGESTIVE SYSTEM

Oesophagus = Esophagus the tube from your mouth to your stomach

Stomach an organ in the body where food is digested

Intestine the tube that digests and absorbs your food Rectum is the final straight portion of the large intestine

Mouth

• AmylaseBreaks down carbohydrates/amylum into glucose

DIGESTIVE ENZYMES

Stomach

• HCl (Hydrochloride Acid)destroy any bacteria or virus that remains in the food

• Reninprimarily associated with coagulation of milk

• Pepsinbreaks down the protein in the food into smaller particles, such as peptide fragments and amino acids

Pancreas

• Lipase degrades triglycerides into fatty acids and glycerol.

• Trypsinogen, breaks down proteins at the basic amino acids

• Amylase breaks down carbohydrates (starches) into sugars which are more easily absorbed by the body

Circulatory / Transport system

Circulatory system consist of:• Heart• Blood vessels : Arteries , Veins, Capillaries

Arteries : carry the blood away from the heartVeins : carry the blood back to the heartCapillaries : enable the exchange of water, oxygen, carbon dioxide, and many other nutrientand waste chemical substances between blood and surrounding tissues.

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CIRCULATORY SYSTEM

RESPIRATORY SYSTEM

Respiratory / breathing system

• Mouth & nose for breath in & out the air• trachea for sending air from nose to the lungs• alveoli for exchange Oxygen and Carbon dioxide• Diaphragm is for expanding and relaxing the lungs ( when diaphragm contracts the lungs expand and the air enter your lungs when it relaxes then the lungs relax too and the air exit your lungs )

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