Human Body Systems.

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Presentation transcript:

Human Body Systems

Organization of the Body Teamwork!

Levels of Organization Cells Tissues Organs Organ Systems Organism

Cells The basic unit of all living things. Specialized cells perform a particular function.

Tissues Tissues are groups of similar cells that perform a single function. 4 Types: Connective Muscle Nervous Epithelial Bone Adipose Cardiac Muscle Skeletal Muscle Neural Tissue Cartilage

Organs An organ is a group of tissues that work together to perform a complex function. Examples: Heart Eye Brain Stomach Lungs

Organ Systems A group of organs that perform closely related functions.

11 Organ Systems Nervous Respiratory Integumentary Digestive Excretory Skeletal Muscular Circulatory Endocrine Reproductive Lymphatic/Immune

Organism An individual animal, plant or single-celled life form

STOP HERE!

Homeostasis The organ systems are working constantly to maintain a controlled, stable environment = Homeostasis. Homeostasis in the body is maintained by feedback loops.

Feedback Loop Positive and negative feedback