What Are Cells?

In 1665 was the first to describe “cells” by viewing a section of cork. Robert Hooke Thought what he saw looked like tiny rooms.

The basic unit of structure and function in living things cell The basic unit of structure and function in living things

Every living thing is made up of cells.

Cells in… Single celled organisms must carry out all life functions. Multi celled organisms work together to stay alive.

All plant and animal cells have some organelles in common. Plant Cell Animal Cell

Cell Membrane Controls what goes in or out of a cell. Forms a protective covering like our skin.

Nucleus Directs all of the cells activities. The nucleus is the “brain” of the cell.

Cytoplasm Contains chemicals that help keep a cell healthy. A jelly like substance

Mitochondria Release energy from food like our stomachs. The “power plants” of cells

Plant cells have some structures that are unique and are not found in animal cells.

Cell Wall Helps support a plant cell like our skeleton. Found outside the cell membrane (like armor)

Chloroplasts Makes food for plant cells Like having a restaurant inside

Cells that work together to perform a specific function are called tissues.

Epithelial Tissue Makes up your skin Lines your respiratory and digestive systems Creates pathways in other organs like your kidneys

Muscle Tissue Yes this type of tissue gives you biceps. It also is found in your heart. A third type of muscle tissue is found in your stomach and intestines.

Connective tissue is found in your tendons, fat, cartilage, bones, and blood.

Nervous Tissue Is found in three places: Your Brain Your Spinal Cord Your Nerves

An organ is several kinds of tissue that work together to carry out a certain function.

Organs that work together to do a job for the body form an organ system.