tissues

Learning goals We are learning to identify the four main types of tissue in the human body. We are learning to identify the hierarchy of structure in the human body.

Most organisms are composed of millions of cells all working together. These organisms are called multicellular organisms and include a wide variety like… worm rabbit deer humans

Therefore, cells group together and become specialized. it would be difficult for each cell in a multicellular organism to perform all of the necessary life processes ( i.e. pumping blood, removing wastes, digesting food) Therefore, cells group together and become specialized.

Groups of cells that do the same thing or have the same job tissues Groups of cells that do the same thing or have the same job

Animal tissue In animals, cells specialize to form 4 types of tissues. The cells in each tissue work together to complete important tasks.

1. Epithelial tissue acts as a protective barrier found on the outside (i.e. skin) or found inside lining the body cavity also produce chemicals like water, hormones and enzymes (i.e. to digest food)

2. Connective tissue joins other tissues together i.e. tendons hold muscle to bones cartilage (cushioning bones) ligaments blood

3. Muscle tissue tissue to help animals move and gives shape there are 3 types of muscle i) skeletal - move your bones ii) smooth - can't control this type of muscle (i.e. muscles in intestines) iii) cardiac - heart muscles which moves blood

4. Nervous tissue "communication tissue" - create & send signals/messages which are called impulses - also stores information (i.e. memories)

Hierarchy of structure Cells  Tissues  Organs  Organ System  Organism

Learning goals We are learning to identify the four main types of tissue in the human body. We are learning to identify the hierarchy of structure in the human body.

Questions to complete What are tissues? List the four basic types of tissues. There are four types of tissues but many more types of specialized cells. Why? Why is nervous tissue known as the “communication” tissue? How does it work? What is one big difference between skeletal and smooth muscle tissue? What is the role of connective tissue? Give one example. Where is epithelial tissue found? What is the hierarchy of structure?