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Human Body Systems

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Human Body Systems How many human body systems are there? Digestive Reproductive Respiratory Nervous Excretory Endocrine Circulatory Skeletal Muscular Nutrition ... – PowerPoint PPT presentation

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Title: Human Body Systems


1
Human Body Systems
2
How many human body systems are there?
  • Digestive Reproductive
  • Respiratory Nervous
  • Excretory Endocrine
  • Circulatory
  • Skeletal
  • Muscular

3
Nutrition
  • Nutrients ? are substances in food that provide
    raw materials and energy the body needs to carry
    out all essential processes.
  • There are six kinds of nutrients carbohydrates,
    fats, proteins, vitamins, minerals, and water.

4
Carbohydrates
  • Example ? Sugar and Starches
  • Function ? main source of energy of life processes

5
Fat
  • Nutrient ? Fat
  • Example ? oils, butter, cream
  • Functions ? A reserve energy supply, building
    material for certain cell structures

6
Protein
  • Example ? Meat, eggs, beans, milk, fish
  • Functions ?supplies amino acids which make new
    cells and body chemicals, repair and maintains
    body tissues

7
Vitamins
  • Example ? A, B, C, D, K
  • Functions ? Necessary for good health and a
    healthy body, lack of a vitamin can cause disease

8
Minerals
  • Example ? Calcium, iron, potassium
  • Functions ? Regulate body functions, needed for
    structure of body parts, maintain good health

9
Water
  • Functions ? Dissolves and transports materials in
    the body which is 70 water, needed for chemical
    reactions in the body

10
Digestive System
  • Is responsible for breaking down food into
    molecules the body can use.
  • Then the molecules are absorbed into the blood
    and carried throughout the body.
  • Finally, wastes are eliminated from the body

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12
Digestive System
  • There are several parts
  • Mouth Pancreas
  • Esophagus Large Intestine
  • Stomach
  • Small Intestine
  • Liver

13
Mouth Salivary Glands
  • Function Physical and Chemical breakdown of food
  • Physical? when your teeth are breaking down the
    food
  • Chemical? the breakdown of complex molecules into
    simple (by enzymes?Amylase)

14
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15
Esophagus
  • Connects the mouth to the stomach
  • Epiglottis? seals off your windpipe, preventing
    the food from entering.
  • Peristalsis? waves of muscle contractions- pushes
    food through the to the stomach

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17
Stomach
  • J- shaped, muscular pouch
  • Pepsin Protease? enzyme digests proteins
  • Hydrochloric Acid ? strong acid helps protease,
    kills bacteria
  • Mucus ? coats and protects the lining of the
    stomach

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19
Small Intestines
  • Completes chemical digestion, food is absorbed
    and transported to cells by blood.
  • Produces protease, amylase, lipase enzymes
  • Long folded increase surface area. Tiny
    finger-likevilli cover inner surface increase
    surface area.

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21
Liver
  • Produces chemicals needed for digestion
  • Liver? breaks down medicines produces bile
  • Bile? breaks down fat particles neutralizes
    stomach acid

22
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23
Pancreas
  • Triangular shaped organ, between stomach and
    small intestines
  • Produces enzymes (protease, amylase, lipase) that
    flow into the small intestines

24
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25
Large Intestines
  • 1 ½ meters long (as long as a bathtub)
  • Absorbs excess water, collects undigested food
    for removal from body

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27
Rectum Anus
  • Rectum? short tube where waste is compressed into
    solid form
  • Anus ? waste material is eliminated from the body
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