Aim: How is life organized?

LEVELS OF ORGANIZATION What does the word, organize, mean? To put into a certain order Given the following items, how would you organize them and why? City, state, country, continent Why? It goes from small to big

Why do we need to organize in our lives? So things can efficiently work together

Why do living things need to be organized? The twelve organ systems of the human body need to work together to maintain _________. What is the basic unit of all life? homeostasis CELLS

Let’s look at an example of human organization What type of cell do you think we are looking at?

Do we only have 1 muscle cell in our body? Cells working together are called Tissue.

Where do we find muscle tissue? Many tissues working together are called Organs.

How can we combine the different muscular organs? Many organs working together make up an organ systems.

ORGANISM Organisms are comprised of many integrated organ systems that work together to maintain a constant stable internal environment.

Multicellular Organisms Can you put these in order? A B C D E Organ system Organ Cell Tissue Organism

Levels of organization

What system is it? Nervous Integumentary Skeletal Muscular Circulatory

What about unicellular organisms? Unicellular organisms do not have Organ systems, but they have __________ which are much simpler, but are equally capable of carrying out metabolic activities. organelles

What is the overall goal of our organ systems? The organ systems work together to maintain homeostasis. In other words, the organ systems maintain an internal stability despite an always changing environment.

Single-Celled vs. Multicellular: Function Single Cell Multicellular Gas Exchange Transport of Substances Nutrition Excretion

Single-Celled vs. Multicellular: Function Single Cell Multicellular Gas Exchange Cell membrane lungs Transport of Substances cytoplasm Blood, circulatory system Nutrition Mouth/digestion Excretion Urinary tract

What system is it? Respiratory

What system is it? Digestive

What system is it? Kidney & Bladder Skin Excretory System

What system is it? Immune System Endocrine System

ATOM ATOMS ARE THE SMALLEST UNIT OF MATTER THAT PARTICIPATE IN CHEMICAL REACTIONS. Examples: Nitrogen, Oxygen, Phosphorus, Carbon

Molecules are two or more atoms that are chemically combined. Can you guess what this molecule is? Hint: It is the most important molecule on earth.

What system is it? Male Reproductive

What system is it? Female Reproductive