Please don’t touch the laptops or microscopes yet. 1. Leave everything on the far tables except your planner and Science Journal. 2. Find a seat. 3. Write your hw down. 4. Put your planner on the table with your stuff. 5. Go back to your seat. 6. Open a textbook. 7. Start reading Chapter 1, section 1.

Organization of the Body: Cells Tissues  Organs  Organ Systems  Organism

1-1.How the Body is Organized Cells Basic unit of structure and function in living things Very tiny (most are microscopic) About 100 trillion in the human body

Simplified Animal Cell What are the 3 main parts of a cell? cell membrane: forms the outside boundary of the cell. cytoplasm: clear, jelly-like substance; contains many other important cell structures (organelles). nucleus: control center of cell; contains DNA.

A cell’s structure helps it perform its function Red blood cells Adipose (fat) cells Neurons (nerve cells)

Tissues A group of similar cells that perform the same function 4 Types of Tissue A group of similar cells that perform the same function 1. Muscle tissue Can contract Enables movement 2. Nerve tissue Carries messages 3. Connective tissue Provides support for the body Connects the parts of the body 4. Epithelial tissue - Covers surfaces, inside & out - Protects, absorbs, releases

This is an example of muscle tissue. The job of this tissue is to contract and help with movement

This is an example of nerve tissue. It can be found in the brain, spinal cord, and nerves. Its function is to carry messages.

This is an example of connective tissue. B This is an example of connective tissue. Connective Tissue provides support for your body and connects all its parts. Bone, fat, and blood are all types of connective tissue. Which one is this a picture of?

This is an example of bone tissue This is an example of bone tissue. Which of the four types of tissue is bone? A B C

B A C This is an example of epithelial tissue. Epithelial tissue covers the surface of your body and the outside of your internal organs. It also lines the inside of some of your organs. Some epithelial tissue protects. Other types absorb or release substances.

The cells in this tissue line a gland in the body that secretes mucus The cells in this tissue line a gland in the body that secretes mucus. What type of tissue is it?

Structures composed of different kinds of tissue Organs Organ System Organism Structures composed of different kinds of tissue Perform a specific job e.g. lungs, heart, liver A group of organs that work together to perform a major function e.g. nervous system, digestive system Composed of different organ systems working together and depending on one another

System Function Nervous Circulatory (Cardiovascular) Respiratory Detects info; interprets info; controls most body functions Circulatory (Cardiovascular) Carries materials to and from body cells; helps fight disease Respiratory Takes in oxygen; eliminates CO2 Digestive Takes in food; breaks down food; absorbs digested materials Skeletal Provides support & protection; makes blood cells; storage Muscular Allows movement; moves food through digestive system Skin (Integumentary) Protects; keeps H2O in; regulates temp. Reproductive Creates offspring; controls gender char. Endocrine Controls many processes via chemicals Excretory Removes wastes Immune Fights disease