Multicellular Organization Section 7.4 – Homeostasis and Cells
Place the following terms in order: Simplest Most Complex Word Paragraph Letter (A, B, C,…) Chapter Book Sentence
Unicellular vs. Multicellular: In unicellular organisms (prokaryotes & eukaryotes), one cell carries out all of the functions of life. Most cells of multicellular organisms are specialized to perform one or a few functions so they depend on the other cells for survival. Both unicellular and multicellular need to maintain homeostasis animal-like protist plant-like protist
Place the following terms in order: Simplest Most Complex Organ Tissue Organism Cell Organ System
Multicellular Organization:
We are all made of cells Organ System Organs Tissues Cells
Cells: Basic unit of structure and function in living things. Cells with a specific structure and function and are found in multi-celled organisms. Examples: skin cells, blood cells, brain cells, bone cells, liver cell, nerve cells, muscle cells, etc. Brain cells Blood cells Liver cells
Tissues: Group of similar cells that carry out a specific function. Examples: epithelium connective muscle nervous
Tissues:
Tissues Continued: Epithelium – sheets of closely packed cells that cover surfaces Connective – loosely scattered cells to support and link together other tissues Muscle – pull against one another Nervous – transmitting messages rapidly
Organs: Several types of tissues that interact to perform a specific function. Examples: stomach, kidney, liver
Organs Continued: The stomach has muscular, epithelial, connective, and nervous tissue. All but the simplest animals have organs.
Organ Systems: Groups of organs that work together to perform a set of related tasks. Examples: digestive, respiratory, circulatory
Organ Systems
Organ Systems Continued: Mouth, esophagus, stomach, and intestines make up the digestive system. Each organ performs a specific function in food digestion. Organ systems interact with other systems like the respiratory system which supplies oxygen to cells to digest food.