Why can’t you use your arm muscles to digest food?
You Are!!!!!!!!!!An organism made of many cells.Made by making more small cells, not by making cells larger.For example: Elephant vs. human
Larger Size1. Larger than single celled organisms2. Prey for less predators3. Wider variety of prey
Longer Life1. Is not limited to the lifespan of a single cell
Specialization1. Each cell has a specific job.2. Makes organism more efficient
Tissue-group of cells that work together to perform a specific job. Material around and between the cells is also part of the tissue.
Animals have four types of tissue1. Nerve tissue2. Muscle tissue3. Connective tissue4. Protective tissue
Plants have three types of tissue:1. Transport tissue- moves water and nutrients through a plant2. Protective tissue- covers the plant; helps the plant retain water, protection3. Ground tissue- photosynthesis takes place here
Organ - a structure made up of two or more tissues working together to perform a specific function
Has several kinds oftissue. Muscle tissue makes food move in and through the stomach. Special tissues make chemicals that help digest your food. Connective tissue holds the stomach together. Nervous tissue carries messages back and forth between the stomach and the brain.
Organ - a structure made upof two or more tissuesworking together to perform aspecific function
A group of organs working together to perform a particular function is called an organ system.Each organ system has a specific job to do in the body.
Plants have organ systems also:LeafsystemStem systemRoot system
Digestive system Stomach and Intestines1. Job is to break down food into small particles.2. The rest of the body depends on the digestive system for fuel. The digestive system depends on the respiratory and cardiovascular systems for oxygen.Cardiovascular System Heart and Blood Vessels
Anything that can perform life processes by itself is an organism.2 types Unicellular and multicellular
Unicellular organisms Bacteria Protists Some Fungi Live in colonies but all of the cells are single cells Each cell must carry out all life processes to survive
In Contrast:Even the simplest multicellular organism has specialized cells that depend on each other for the survival of the organism.
Holt Science and Technology. Holt, Rinehart, and Winston. Harcourt Education Company. Austin, Texas 2005.
UCP 1: Systems, order, and organization UCP 2: Evidence, models, and explanation UCP 5: Form and function LS 1a: Living systems at all levels of organization demonstrate the complementary nature of structure and function. Important levels of organization for structure and function include cells, organs, tissues, organ systems, whole organisms, and ecosystems. LS 1b: All organisms are composed of cells—the fundamental unit of life. Most organisms are single cells; other organisms, including humans, are multicellular. LS 1d: Specialized cells perform specialized functions in multicellular organisms. Groups of specialized cells cooperate to form a tissue, such as a muscle. Different tissues are in turn grouped together to form larger functional units, called organs. Each type of cell, tissue, or organ has a distinct structure and set of functions that serves the organism as a whole.