The Different Jobs of Cells 2 Cell Organization Many-celled organisms are not just mixed-up collections of different types of cells. Cells are organized into systems that, together, perform functions that keep the organism healthy and alive.

organelle Parts of a cell that have a special job found inside in the cytoplasm Ex. nucleus vacuole mitochondria chloroplast

cell Smallest unit of life Ex. Bone cell, muscle cell, nerve cell, etc.

The Different Jobs of Cells 2 Tissues and Organs Cells that are alike are organized into tissue (TIH shewz). Blood is a Tissue Tissues are groups of similar cells that all do the same sort of work.

Tissues Ex. Blood made of blood cells Bone tissue made of bone cells

The Different Jobs of Cells 2 Tissues and Organs Different types of tissues working together can form a structure called an organ (OR gun). The stomach is an organ that includes muscle tissue, nerve tissue, and blood tissue. Other human organs include the heart and the kidneys.

The Different Jobs of Cells 2 Organs Systems A group of organs that work together to do a certain job is called an organ system. Organ systems found in your body include the respiratory system, the circulatory system, the reproductive system, and the nervous system. Click box to view movie.

Organ systems Nervous system includes the brain, nerves and spinal cord Respiratory system is the nose, trachea, and lungs

Organs Systems 2 Organ systems also work together. The Different Jobs of Cells 2 Organs Systems Organ systems also work together. For example, the muscular system has more than 600 muscles that are attached to bones. The contracting cells of muscle tissue cause your bones, which are part of the skeletal system, to move.

organism A living thing Ex. Humans, trees, grass animals

Smallest to largest-order from top to bottom tissue, organ system, cell, organism, organ, organelle (cell part)

Smallest to largest Organelle (cell part) cell tissue organ Organ system organism population community ecosystem biome biosphere

Question 2 2 Which is the correct order of cell organization? Section Check 2 Question 2 Which is the correct order of cell organization? A. cell, tissue, organ system, organ B. cell, organ, tissue, organ system C. cell, tissue, organ, organ system D. tissue, cell, organ, organ system

Section Check 2 Answer The answer is C. Cells are organized into systems that, together, perform functions that keep the organism alive.