4.3 multicellular organization

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4.3 Multicellular Organization Unicellular One cell carries out everything. Multicellular *Cells are differentiated to perform specific functions.

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4.3 Multicellular Organization. Unicellular * One cell carries out everything. Multicellular *Cells are differentiated to perform specific functions. Cells make up Tissues that make up Organs that make up Organ Systems that make up Complete Organisms. Cells. - PowerPoint PPT Presentation

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Page 1: 4.3 Multicellular Organization

4.3 Multicellular Organization

Unicellular

One cell carries out everything.

Multicellular

*Cells are differentiated to perform specific functions.

Page 2: 4.3 Multicellular Organization

Cells make up Tissues that make up Organs that make up Organ Systems that make up Complete Organisms.

Page 3: 4.3 Multicellular Organization

Cells The basic unit of life.

Page 4: 4.3 Multicellular Organization

Tissues A group of

similar cells which carry out a common function.

Page 5: 4.3 Multicellular Organization

Organ Several types of

body tissues that together form a function. Examples are stomach, lungs, heart.

Page 6: 4.3 Multicellular Organization

Organ System

A group of organs that interact to perform a set of related tasks. Examples of organ systems are; digestive, respiratory, reproductive, endocrine, immune, urinary.

Page 7: 4.3 Multicellular Organization

Organ SystemThe digestive

system is made up of the following organs: mouth, esophagus, stomach, large intestines, small intestines, pancreas, gall bladder.

Page 8: 4.3 Multicellular Organization

Organism

Living things.

Page 9: 4.3 Multicellular Organization

Specialized Tissues (“MENC”)

Muscle

*contraction

Epithelial

*surface covering

Nervous

*transmits messages

Connective

*support and link together

Page 10: 4.3 Multicellular Organization

Specialized Tissues Example of specialized

tissues.Take cells that make

up the stomach. *muscle tissue causes

movement. *epithelial tissue secretes

enzymes. *nervous tissue transmits

messages back and forth from stomach to brain.

*connective tissue holds stomach together.

Page 11: 4.3 Multicellular Organization

Plants have Tissues and Organs

Vascular tissue transports water and nutrients from leaves to roots and from roots to leaves.

Organs are roots, stems, leaves.

Page 12: 4.3 Multicellular Organization

Prokaryotes *First cells on Earth. * Evidenced by fossils Did not produce own food. Depend on nutrients in environment.*Through evolution, these cells started to

compete for the environment and cells with adaptations evolved. These were eukaryotes.

Page 13: 4.3 Multicellular Organization

Colonial Organisms

A collection of genetically identical cells that live together in a closely connected group and each cell group has its own function.

The green alga known as volvox is the evolutionary link between unicellular organisms and multicellular organisms. It still lacks tissues and organs.