Body Organization Section 1 1 Cells Tissues Organs

Body Organization Section 1 -1

Cells, Tissues, Organs • A group of cells working together is called a tissue • There are four major types of tissue: – Muscle tissue – Nervous tissue – Connective tissue – Epithelial tissue

Epithelial tissue • Covers and protects underlying tissue • Epithelial tissue can be found on the outside of our skin and on the outside of our organs

Nervous tissue • Sends electrical signals throughout our body • It makes up our brain, nerves, and sense organs

Muscle tissue • Made of cells that contract and relax to produce movement

Connective tissue • Joins, supports, protects, nourishes, and cushions organs • There are many different kinds such as ligaments and even blood

How the body is organized Tissues Organ systems

Homeostasis • The maintenance of a stable internal environment • The body is able to maintain fairly constant body temperature, blood sugar, water level, etc. • Our body is able to do this because of specialized cells, tissues, and organs

Body Systems Chart • Use the Green Books and your muscle partner to fill in the organ systems chart. – Start on pages 6 -7 – Then, use the index (back) or Table of Contents (front) to find the organ system details • Remember that organs are groups of tissues that work together…therefore… a bone is an organ too!