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Levels of organization in the human body. Organ (brain). Organism (David Hasselhoff ). Cell (red blood cells). Cells Tissues Organs Organ Systems Organism. Each level of organization gets more complex!!!. CELLS: 1. Building blocks of the body Pretty small!
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Levels of organization in the human body Organ (brain) Organism (David Hasselhoff) Cell (red blood cells)
Cells Tissues Organs Organ Systems Organism
CELLS: 1 • Building blocks of the body • Pretty small! • Different human cells have different jobs (skin cells, nerve cells, blood cells, etc.) Nerve cell Red (and white) blood cells
TISSUES: 2 • Group of similar cells that perform the same function • 4 main kinds: • Muscle tissues • Nerve tissues • Connective tissues • Epithelial tissues
ORGANS: 3 • Structure in the body made of different types of tissues • Each organ has a specific job Thigh Bone Liver
ORGAN SYSTEM: 4 • Group of organs that work together to perform a major function • Work closely with other organ systems to keep you alive!
Organism! • A living thing! • Made up of cells, tissues, organs, and organ systems… all working together!