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An Introduction to the Human Body

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Presentation on theme: "An Introduction to the Human Body"— Presentation transcript:

1 An Introduction to the Human Body

2 Anatomy study of structure relationships among structures
Derived from the Greek words: - Anatome - to dissect - Ana - apart - Tomy - cut

3 Subdivisions of Anatomy
Examples: - gross anatomy (macroscopic) study of large body parts (muscles, bones, and internal organs) - histology (microscopic) study of cells and tissues requiring the use of a microscope

4 Physiology study of the functions of body parts and how they work together - physio - working - ology - study

5 Subdivisions of Physiology
Examples: - neurophysiology - brain and nervous tissue - cardiac - heart - respiratory - lungs and trachea - reproductive - reproductive organs - renal - kidneys, bladder, and ureters - endocrine - endocrine organs

6 Levels of Structural Organization
atoms molecules cells tissues organs systems organism

7 Atoms tiny building blocks of matter
Examples of the most common atoms: carbon (C) hydrogen (H) oxygen (O) nitrogen (N) calcium (Ca) potassium (K) sodium (Na)

8 atoms combine together to form molecules

9 Molecules chemical combination of 2 or more atoms
Examples of molecules: - proteins - carbohydrates - fats - vitamins

10 Molecule ATP

11 Cells basic structural and functional units of an organism
cell groups have different structures perform different functions specialized structures within a cell are called organelles

12 Cell

13 Tissues Four basic types of tissues in the human body:
- epithelial tissue - muscle tissue - connective tissue - nervous tissue

14 Epithelial Tissue - Skin

15 Muscle Tissue

16 Connective Tissue - Bone

17 Nervous Tissue - Brain

18 Tissues (cont.) each cell within a tissue has a specific function
Examples: - parietal cells produce hydrochloric acid (HCl) in stomach - mucous cells produce mucus

19 Organs structures composed of two or more tissue types
specific functions recognizable shapes Examples: - heart, lungs, brain, liver, stomach, intestines, etc.

20 Organ

21 Systems several organs work together for a common purpose Example:
- digestive system includes many organs, each with its own function

22 Organ System digestive system

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