An organ system is a group of organs that work together as a biological system to perform one or more functions.

An organism is an individual animal, plant, or single-celled life form.

Organs are a group of tissues in a living organism that have been adapted to perform a specific function.

Bone cells work to maintain a balance between bone formation & resorption. Movement, support & protect soft tissues. Bone cells contain osteons or haversian systems.

The function of a blood cell is to carry oxygen from the lungs to the body tissues and carbon dioxide as a waste product, away from the tissues and back to the lungs. The shape of the cell allows oxygen exchange at a constant rate over the largest possible area.

The Nerve Cell processes and transmits information. Nerve cells are shaped like long wires so they can carry messages from one end of the body to the other.

The function of the skin cell is to create a barrier between you and the rest of the world. The cell is mostly sacks filled with carotene which protects you.

Muscle cells contain protein filaments of actin and myosin, it is made up of overlapping cells to contract when you move.

Digestive System - mouth, salivary glands, esophagus, stomach, liver, gall bladder, pancreas and small & large intestines & colon (expels waste). Breaks down food so nutrients can be absorbed by blood and transported to all cells.

Excretory System= Kidneys, Bladder, and Ureter, Urethra. Filters the blood and removes liquid waste & excess water

Respiratory System= Lungs, Trachea, and Nose. Allows oxygen in & carbon dioxide out (respiration)

Skeletal System - bones & cartilage - supports movement, protect organs, attach tissues

Muscular System - tendons & ligaments - enables you to move and moves substances through body - 3 types - smooth,(around hollow organs) skeletal (around bones) and cardiac (around heart)

Circulatory System - heart, blood vessels, blood - deliver nutrients, move gases and remove waste

Nervous System - brain, spinal cord, nerves - sends & receives nerve messages. Controls behaviour, movement, & processes digestion and circulation

Integumentary System - skin, hair, nails & sweat glands (maintain normal body temperature) which cover & protect body

Connective tissue - blood, bone, fat - supports & connects part of the body

Epithelial tissue - Outer protective coating ex. skin, lining of intestine.

Nervous tissue - send + receive signals ex. brain, spinal cord.

Muscle tissue - contracts to cause motion ex. quad muscle

Cell Membrane - protection - always selectively permeable

Cell wall (plant only) - surrounds cell, very strong, supports

Vacuole - empty sacs in cytoplasm, storage for food, water, waste, very large in plants

Chloroplast (plant only) - contains chlorophyl, absorbs sunlight converts to energy to make food (photosynthesis)

Endoplasmic Reticulum - produces protein for rest of cell to function (tubelike, rough and smooth)

Ribosomes - decode the message & formation of peptide bonds

Golgi Apparatus - packages proteins into vesicles prior to secretion

Nucleus - control centre, largest organelle, regulates all other organelles, contains genetic information