Grade 8 Science A presentation by Miss Walker Cell Organization Grade 8 Science A presentation by Miss Walker

Levels of cell organization

Cells are the basic building block of all living things. All living things are composed of cells. All cells come from pre-existing cells.

Blood Cells Nerve Cells Asparagus cells Variety of Cells Human Muscle Cells Bladder Cells Onion Cells Epithelial Cells

Similar cells are organized into tissues.

A tissue is a group of cells that are similar in shape and function. Nerve Tissue A tissue is a group of cells that are similar in shape and function. Bone Tissue Areolar tissue: Connective tissue that surrounds organs and lies under the skin. Muscle Tissue Connective Tissue found at the ends of bones. Elastic Cartilage tissue found in the human ear. Epithelial Tissue Connective Tissue

Tissues are often organized into larger structures called organs. Tissue A Tissue B Organ Tissue C Tissue D Tissues are often organized into larger structures called organs.

Organs Human Heart The Brain Lungs Human spleen

Organ Systems are groups of organs that have related functions. For example, the circulatory system includes the heart; arteries that carry blood from the heart to the tissues; capillaries where nutrients and wastes are exchanged; and veins that carry blood and wastes from the tissues back to the heart. Nerve tissue, blood, epithelial tissue, connective tissue, and muscle tissue are all found in the circulatory system.

Circulatory System Heart Vein Capillary Organs in the system Epithelial Muscle Nerve Tissues in the organs Blood Connective Cells in the tissues

Listening and Viewing Quiz Grade 8 Science

1.) What word can be used to fill in all of the blanks? __________ are the building blocks of all living things. All living things are composed of __________. All ______________ come from pre-existing _______________.

2.) List three types of cells that were shown in the presentation.

3.) Cells that are similar in shape and function are organized into _____________.

4.) List 3 types of tissues that were shown in the presentation.

5.) Different kinds of tissues are often organized into larger structures called __________.

6.) List three different organs that were shown in the presentation.

7.) ________________ are groups of organs that have related functions.

8.) List three different organ systems found in the human body.

9.) Put the following terms in order from smallest to largest. Organ Organ system Cell Tissue

10.) There are at least five different kinds of tissues in the circulatory system. List three.

The End