The Organization of the Human
Body
Presentation by
Liannette Bellido Cintrón
BIOLOGY AND GEOLOGY
3˚ ESO
I.E.S. FRANCISCO RODRÍGUEZ MARÍN
• All living things are made up of cells, the most basic and fundamental unit.
• Cells are capable, by themselves, of the three vital functions: nutrition, interaction and reproduction.
• The cells in a multicellular organism come together to form a superior structure that carries out these funtions.
• Characteristics of multicellular organisms:– All the cells in a multicellular
organisms cells come from the division of one initial cell, called the zygote or egg cell.
– Despite all our cells come from one inicial cell, multicellular organisms are made up of different cells, specialized in different functions.
– As a consecuence of the especialization of these cells, the organism shares the work between different systems.
– All the cells of an organism co-ordinate their activities to allow a total activity of the organism.
True or False?
Human beings are multicellular organisms.
TRUE!
• Cells that have similar form and characteristics, form tissues that are specialized in carrying out certain functions.– E.g Covering tissues, supporting tissues,
storing tissues, muscle tissue etc.
• Tissues join to form organs. Each organ carries out a specific function in the organism. For example, the heart pumps blood.
Can you name other organs?
• A collection of organs that carry out related functions make up a system.– e.g Digestive system:
•
Can you name other systems?
• The collection of all organs and systems make up a multicellular organism.
• The human being, like any living thing, carries out the 3 vital functions: Nutrition, interaction and reproduction. The body parts implicated in these functions are:– Nutrition
– Interaction
– Reproduction
Digestive system
Circulatory system
Excretory system
Respiratory system
Nervous system
Musculoskeletal system
Endocrine system
Sensory organs
Male reproductive system
Female reproductive system